rebase -i --autosquash: auto-squash commits
[gitweb.git] / http-push.c
index f743c9796a369a44c84238c244314da3c7b45dab..432b20f2d9a750263d930683e770413ac5328935 100644 (file)
@@ -1,6 +1,5 @@
 #include "cache.h"
 #include "commit.h"
-#include "pack.h"
 #include "tag.h"
 #include "blob.h"
 #include "http.h"
@@ -10,6 +9,7 @@
 #include "exec_cmd.h"
 #include "remote.h"
 #include "list-objects.h"
+#include "sigchain.h"
 
 #include <expat.h>
 
@@ -26,7 +26,6 @@ enum XML_Status {
 #endif
 
 #define PREV_BUF_SIZE 4096
-#define RANGE_HEADER_SIZE 30
 
 /* DAV methods */
 #define DAV_LOCK "LOCK"
@@ -75,12 +74,11 @@ static int pushing;
 static int aborted;
 static signed char remote_dir_exists[256];
 
-static struct curl_slist *no_pragma_header;
-
 static int push_verbosely;
 static int push_all = MATCH_REFS_NONE;
 static int force_all;
 static int dry_run;
+static int helper_status;
 
 static struct object_list *objects;
 
@@ -96,7 +94,7 @@ struct repo
        struct remote_lock *locks;
 };
 
-static struct repo *remote;
+static struct repo *repo;
 
 enum transfer_state {
        NEED_FETCH,
@@ -118,19 +116,10 @@ struct transfer_request
        struct remote_lock *lock;
        struct curl_slist *headers;
        struct buffer buffer;
-       char filename[PATH_MAX];
-       char tmpfile[PATH_MAX];
-       int local_fileno;
-       FILE *local_stream;
        enum transfer_state state;
        CURLcode curl_result;
        char errorstr[CURL_ERROR_SIZE];
        long http_code;
-       unsigned char real_sha1[20];
-       git_SHA_CTX c;
-       z_stream stream;
-       int zret;
-       int rename;
        void *userData;
        struct active_request_slot *slot;
        struct transfer_request *next;
@@ -152,6 +141,7 @@ struct remote_lock
        char *url;
        char *owner;
        char *token;
+       char tmpfile_suffix[41];
        time_t start_time;
        long timeout;
        int refreshing;
@@ -177,6 +167,66 @@ struct remote_ls_ctx
        struct remote_ls_ctx *parent;
 };
 
+/* get_dav_token_headers options */
+enum dav_header_flag {
+       DAV_HEADER_IF = (1u << 0),
+       DAV_HEADER_LOCK = (1u << 1),
+       DAV_HEADER_TIMEOUT = (1u << 2)
+};
+
+static char *xml_entities(char *s)
+{
+       struct strbuf buf = STRBUF_INIT;
+       while (*s) {
+               size_t len = strcspn(s, "\"<>&");
+               strbuf_add(&buf, s, len);
+               s += len;
+               switch (*s) {
+               case '"':
+                       strbuf_addstr(&buf, "&quot;");
+                       break;
+               case '<':
+                       strbuf_addstr(&buf, "&lt;");
+                       break;
+               case '>':
+                       strbuf_addstr(&buf, "&gt;");
+                       break;
+               case '&':
+                       strbuf_addstr(&buf, "&amp;");
+                       break;
+               case 0:
+                       return strbuf_detach(&buf, NULL);
+               }
+               s++;
+       }
+       return strbuf_detach(&buf, NULL);
+}
+
+static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
+{
+       struct strbuf buf = STRBUF_INIT;
+       struct curl_slist *dav_headers = NULL;
+
+       if (options & DAV_HEADER_IF) {
+               strbuf_addf(&buf, "If: (<%s>)", lock->token);
+               dav_headers = curl_slist_append(dav_headers, buf.buf);
+               strbuf_reset(&buf);
+       }
+       if (options & DAV_HEADER_LOCK) {
+               strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
+               dav_headers = curl_slist_append(dav_headers, buf.buf);
+               strbuf_reset(&buf);
+       }
+       if (options & DAV_HEADER_TIMEOUT) {
+               strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
+               dav_headers = curl_slist_append(dav_headers, buf.buf);
+               strbuf_reset(&buf);
+       }
+       strbuf_release(&buf);
+
+       return dav_headers;
+}
+
 static void finish_request(struct transfer_request *request);
 static void release_request(struct transfer_request *request);
 
@@ -189,165 +239,30 @@ static void process_response(void *callback_data)
 }
 
 #ifdef USE_CURL_MULTI
-static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
-                              void *data)
-{
-       unsigned char expn[4096];
-       size_t size = eltsize * nmemb;
-       int posn = 0;
-       struct transfer_request *request = (struct transfer_request *)data;
-       do {
-               ssize_t retval = xwrite(request->local_fileno,
-                                      (char *) ptr + posn, size - posn);
-               if (retval < 0)
-                       return posn;
-               posn += retval;
-       } while (posn < size);
-
-       request->stream.avail_in = size;
-       request->stream.next_in = ptr;
-       do {
-               request->stream.next_out = expn;
-               request->stream.avail_out = sizeof(expn);
-               request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
-               git_SHA1_Update(&request->c, expn,
-                           sizeof(expn) - request->stream.avail_out);
-       } while (request->stream.avail_in && request->zret == Z_OK);
-       data_received++;
-       return size;
-}
 
 static void start_fetch_loose(struct transfer_request *request)
 {
-       char *hex = sha1_to_hex(request->obj->sha1);
-       char *filename;
-       char prevfile[PATH_MAX];
-       char *url;
-       char *posn;
-       int prevlocal;
-       unsigned char prev_buf[PREV_BUF_SIZE];
-       ssize_t prev_read = 0;
-       long prev_posn = 0;
-       char range[RANGE_HEADER_SIZE];
-       struct curl_slist *range_header = NULL;
        struct active_request_slot *slot;
+       struct http_object_request *obj_req;
 
-       filename = sha1_file_name(request->obj->sha1);
-       snprintf(request->filename, sizeof(request->filename), "%s", filename);
-       snprintf(request->tmpfile, sizeof(request->tmpfile),
-                "%s.temp", filename);
-
-       snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
-       unlink(prevfile);
-       rename(request->tmpfile, prevfile);
-       unlink(request->tmpfile);
-
-       if (request->local_fileno != -1)
-               error("fd leakage in start: %d", request->local_fileno);
-       request->local_fileno = open(request->tmpfile,
-                                    O_WRONLY | O_CREAT | O_EXCL, 0666);
-       /* This could have failed due to the "lazy directory creation";
-        * try to mkdir the last path component.
-        */
-       if (request->local_fileno < 0 && errno == ENOENT) {
-               char *dir = strrchr(request->tmpfile, '/');
-               if (dir) {
-                       *dir = 0;
-                       mkdir(request->tmpfile, 0777);
-                       *dir = '/';
-               }
-               request->local_fileno = open(request->tmpfile,
-                                            O_WRONLY | O_CREAT | O_EXCL, 0666);
-       }
-
-       if (request->local_fileno < 0) {
+       obj_req = new_http_object_request(repo->url, request->obj->sha1);
+       if (obj_req == NULL) {
                request->state = ABORTED;
-               error("Couldn't create temporary file %s for %s: %s",
-                     request->tmpfile, request->filename, strerror(errno));
                return;
        }
 
-       memset(&request->stream, 0, sizeof(request->stream));
-
-       git_inflate_init(&request->stream);
-
-       git_SHA1_Init(&request->c);
-
-       url = xmalloc(strlen(remote->url) + 50);
-       request->url = xmalloc(strlen(remote->url) + 50);
-       strcpy(url, remote->url);
-       posn = url + strlen(remote->url);
-       strcpy(posn, "objects/");
-       posn += 8;
-       memcpy(posn, hex, 2);
-       posn += 2;
-       *(posn++) = '/';
-       strcpy(posn, hex + 2);
-       strcpy(request->url, url);
-
-       /* If a previous temp file is present, process what was already
-          fetched. */
-       prevlocal = open(prevfile, O_RDONLY);
-       if (prevlocal != -1) {
-               do {
-                       prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
-                       if (prev_read>0) {
-                               if (fwrite_sha1_file(prev_buf,
-                                                    1,
-                                                    prev_read,
-                                                    request) == prev_read) {
-                                       prev_posn += prev_read;
-                               } else {
-                                       prev_read = -1;
-                               }
-                       }
-               } while (prev_read > 0);
-               close(prevlocal);
-       }
-       unlink(prevfile);
-
-       /* Reset inflate/SHA1 if there was an error reading the previous temp
-          file; also rewind to the beginning of the local file. */
-       if (prev_read == -1) {
-               memset(&request->stream, 0, sizeof(request->stream));
-               git_inflate_init(&request->stream);
-               git_SHA1_Init(&request->c);
-               if (prev_posn>0) {
-                       prev_posn = 0;
-                       lseek(request->local_fileno, 0, SEEK_SET);
-                       ftruncate(request->local_fileno, 0);
-               }
-       }
-
-       slot = get_active_slot();
+       slot = obj_req->slot;
        slot->callback_func = process_response;
        slot->callback_data = request;
        request->slot = slot;
-
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
-       curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
-
-       /* If we have successfully processed data from a previous fetch
-          attempt, only fetch the data we don't already have. */
-       if (prev_posn>0) {
-               if (push_verbosely)
-                       fprintf(stderr,
-                               "Resuming fetch of object %s at byte %ld\n",
-                               hex, prev_posn);
-               sprintf(range, "Range: bytes=%ld-", prev_posn);
-               range_header = curl_slist_append(range_header, range);
-               curl_easy_setopt(slot->curl,
-                                CURLOPT_HTTPHEADER, range_header);
-       }
+       request->userData = obj_req;
 
        /* Try to get the request started, abort the request on error */
        request->state = RUN_FETCH_LOOSE;
        if (!start_active_slot(slot)) {
                fprintf(stderr, "Unable to start GET request\n");
-               remote->can_update_info_refs = 0;
+               repo->can_update_info_refs = 0;
+               release_http_object_request(obj_req);
                release_request(request);
        }
 }
@@ -356,16 +271,8 @@ static void start_mkcol(struct transfer_request *request)
 {
        char *hex = sha1_to_hex(request->obj->sha1);
        struct active_request_slot *slot;
-       char *posn;
 
-       request->url = xmalloc(strlen(remote->url) + 13);
-       strcpy(request->url, remote->url);
-       posn = request->url + strlen(remote->url);
-       strcpy(posn, "objects/");
-       posn += 8;
-       memcpy(posn, hex, 2);
-       posn += 2;
-       strcpy(posn, "/");
+       request->url = get_remote_object_url(repo->url, hex, 1);
 
        slot = get_active_slot();
        slot->callback_func = process_response;
@@ -389,21 +296,15 @@ static void start_mkcol(struct transfer_request *request)
 
 static void start_fetch_packed(struct transfer_request *request)
 {
-       char *url;
        struct packed_git *target;
-       FILE *packfile;
-       char *filename;
-       long prev_posn = 0;
-       char range[RANGE_HEADER_SIZE];
-       struct curl_slist *range_header = NULL;
 
        struct transfer_request *check_request = request_queue_head;
-       struct active_request_slot *slot;
+       struct http_pack_request *preq;
 
-       target = find_sha1_pack(request->obj->sha1, remote->packs);
+       target = find_sha1_pack(request->obj->sha1, repo->packs);
        if (!target) {
                fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
-               remote->can_update_info_refs = 0;
+               repo->can_update_info_refs = 0;
                release_request(request);
                return;
        }
@@ -411,67 +312,36 @@ static void start_fetch_packed(struct transfer_request *request)
        fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
        fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
 
-       filename = sha1_pack_name(target->sha1);
-       snprintf(request->filename, sizeof(request->filename), "%s", filename);
-       snprintf(request->tmpfile, sizeof(request->tmpfile),
-                "%s.temp", filename);
-
-       url = xmalloc(strlen(remote->url) + 64);
-       sprintf(url, "%sobjects/pack/pack-%s.pack",
-               remote->url, sha1_to_hex(target->sha1));
+       preq = new_http_pack_request(target, repo->url);
+       if (preq == NULL) {
+               release_http_pack_request(preq);
+               repo->can_update_info_refs = 0;
+               return;
+       }
+       preq->lst = &repo->packs;
 
        /* Make sure there isn't another open request for this pack */
        while (check_request) {
                if (check_request->state == RUN_FETCH_PACKED &&
-                   !strcmp(check_request->url, url)) {
-                       free(url);
+                   !strcmp(check_request->url, preq->url)) {
+                       release_http_pack_request(preq);
                        release_request(request);
                        return;
                }
                check_request = check_request->next;
        }
 
-       packfile = fopen(request->tmpfile, "a");
-       if (!packfile) {
-               fprintf(stderr, "Unable to open local file %s for pack",
-                       request->tmpfile);
-               remote->can_update_info_refs = 0;
-               free(url);
-               return;
-       }
-
-       slot = get_active_slot();
-       slot->callback_func = process_response;
-       slot->callback_data = request;
-       request->slot = slot;
-       request->local_stream = packfile;
-       request->userData = target;
-
-       request->url = url;
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
-       slot->local = packfile;
-
-       /* If there is data present from a previous transfer attempt,
-          resume where it left off */
-       prev_posn = ftell(packfile);
-       if (prev_posn>0) {
-               if (push_verbosely)
-                       fprintf(stderr,
-                               "Resuming fetch of pack %s at byte %ld\n",
-                               sha1_to_hex(target->sha1), prev_posn);
-               sprintf(range, "Range: bytes=%ld-", prev_posn);
-               range_header = curl_slist_append(range_header, range);
-               curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
-       }
+       preq->slot->callback_func = process_response;
+       preq->slot->callback_data = request;
+       request->slot = preq->slot;
+       request->userData = preq;
 
        /* Try to get the request started, abort the request on error */
        request->state = RUN_FETCH_PACKED;
-       if (!start_active_slot(slot)) {
+       if (!start_active_slot(preq->slot)) {
                fprintf(stderr, "Unable to start GET request\n");
-               remote->can_update_info_refs = 0;
+               release_http_pack_request(preq);
+               repo->can_update_info_refs = 0;
                release_request(request);
        }
 }
@@ -480,7 +350,7 @@ static void start_put(struct transfer_request *request)
 {
        char *hex = sha1_to_hex(request->obj->sha1);
        struct active_request_slot *slot;
-       char *posn;
+       struct strbuf buf = STRBUF_INIT;
        enum object_type type;
        char hdr[50];
        void *unpacked;
@@ -519,21 +389,13 @@ static void start_put(struct transfer_request *request)
 
        request->buffer.buf.len = stream.total_out;
 
-       request->url = xmalloc(strlen(remote->url) +
-                              strlen(request->lock->token) + 51);
-       strcpy(request->url, remote->url);
-       posn = request->url + strlen(remote->url);
-       strcpy(posn, "objects/");
-       posn += 8;
-       memcpy(posn, hex, 2);
-       posn += 2;
-       *(posn++) = '/';
-       strcpy(posn, hex + 2);
-       request->dest = xmalloc(strlen(request->url) + 14);
-       sprintf(request->dest, "Destination: %s", request->url);
-       posn += 38;
-       *(posn++) = '_';
-       strcpy(posn, request->lock->token);
+       strbuf_addstr(&buf, "Destination: ");
+       append_remote_object_url(&buf, repo->url, hex, 0);
+       request->dest = strbuf_detach(&buf, NULL);
+
+       append_remote_object_url(&buf, repo->url, hex, 0);
+       strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
+       request->url = strbuf_detach(&buf, NULL);
 
        slot = get_active_slot();
        slot->callback_func = process_response;
@@ -541,11 +403,15 @@ static void start_put(struct transfer_request *request)
        curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
        curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+#ifndef NO_CURL_IOCTL
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
+#endif
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
+       curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
        curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
-       curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
        curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
 
        if (start_active_slot(slot)) {
@@ -588,18 +454,12 @@ static int refresh_lock(struct remote_lock *lock)
 {
        struct active_request_slot *slot;
        struct slot_results results;
-       char *if_header;
-       char timeout_header[25];
-       struct curl_slist *dav_headers = NULL;
+       struct curl_slist *dav_headers;
        int rc = 0;
 
        lock->refreshing = 1;
 
-       if_header = xmalloc(strlen(lock->token) + 25);
-       sprintf(if_header, "If: (<%s>)", lock->token);
-       sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
-       dav_headers = curl_slist_append(dav_headers, if_header);
-       dav_headers = curl_slist_append(dav_headers, timeout_header);
+       dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
 
        slot = get_active_slot();
        slot->results = &results;
@@ -622,14 +482,13 @@ static int refresh_lock(struct remote_lock *lock)
 
        lock->refreshing = 0;
        curl_slist_free_all(dav_headers);
-       free(if_header);
 
        return rc;
 }
 
 static void check_locks(void)
 {
-       struct remote_lock *lock = remote->locks;
+       struct remote_lock *lock = repo->locks;
        time_t current_time = time(NULL);
        int time_remaining;
 
@@ -662,19 +521,14 @@ static void release_request(struct transfer_request *request)
                        entry->next = entry->next->next;
        }
 
-       if (request->local_fileno != -1)
-               close(request->local_fileno);
-       if (request->local_stream)
-               fclose(request->local_stream);
        free(request->url);
        free(request);
 }
 
 static void finish_request(struct transfer_request *request)
 {
-       struct stat st;
-       struct packed_git *target;
-       struct packed_git **lst;
+       struct http_pack_request *preq;
+       struct http_object_request *obj_req;
 
        request->curl_result = request->slot->curl_result;
        request->http_code = request->slot->http_code;
@@ -729,77 +583,46 @@ static void finish_request(struct transfer_request *request)
                        aborted = 1;
                }
        } else if (request->state == RUN_FETCH_LOOSE) {
-               fchmod(request->local_fileno, 0444);
-               close(request->local_fileno); request->local_fileno = -1;
-
-               if (request->curl_result != CURLE_OK &&
-                   request->http_code != 416) {
-                       if (stat(request->tmpfile, &st) == 0) {
-                               if (st.st_size == 0)
-                                       unlink(request->tmpfile);
-                       }
-               } else {
-                       if (request->http_code == 416)
-                               fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
-
-                       git_inflate_end(&request->stream);
-                       git_SHA1_Final(request->real_sha1, &request->c);
-                       if (request->zret != Z_STREAM_END) {
-                               unlink(request->tmpfile);
-                       } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
-                               unlink(request->tmpfile);
-                       } else {
-                               request->rename =
-                                       move_temp_to_file(
-                                               request->tmpfile,
-                                               request->filename);
-                               if (request->rename == 0) {
-                                       request->obj->flags |= (LOCAL | REMOTE);
-                               }
-                       }
-               }
+               obj_req = (struct http_object_request *)request->userData;
+
+               if (finish_http_object_request(obj_req) == 0)
+                       if (obj_req->rename == 0)
+                               request->obj->flags |= (LOCAL | REMOTE);
 
                /* Try fetching packed if necessary */
-               if (request->obj->flags & LOCAL)
+               if (request->obj->flags & LOCAL) {
+                       release_http_object_request(obj_req);
                        release_request(request);
-               else
+               else
                        start_fetch_packed(request);
 
        } else if (request->state == RUN_FETCH_PACKED) {
+               int fail = 1;
                if (request->curl_result != CURLE_OK) {
                        fprintf(stderr, "Unable to get pack file %s\n%s",
                                request->url, curl_errorstr);
-                       remote->can_update_info_refs = 0;
                } else {
-                       off_t pack_size = ftell(request->local_stream);
-
-                       fclose(request->local_stream);
-                       request->local_stream = NULL;
-                       if (!move_temp_to_file(request->tmpfile,
-                                              request->filename)) {
-                               target = (struct packed_git *)request->userData;
-                               target->pack_size = pack_size;
-                               lst = &remote->packs;
-                               while (*lst != target)
-                                       lst = &((*lst)->next);
-                               *lst = (*lst)->next;
-
-                               if (!verify_pack(target))
-                                       install_packed_git(target);
-                               else
-                                       remote->can_update_info_refs = 0;
+                       preq = (struct http_pack_request *)request->userData;
+
+                       if (preq) {
+                               if (finish_http_pack_request(preq) == 0)
+                                       fail = 0;
+                               release_http_pack_request(preq);
                        }
                }
+               if (fail)
+                       repo->can_update_info_refs = 0;
                release_request(request);
        }
 }
 
 #ifdef USE_CURL_MULTI
+static int is_running_queue;
 static int fill_active_slot(void *unused)
 {
-       struct transfer_request *request = request_queue_head;
+       struct transfer_request *request;
 
-       if (aborted)
+       if (aborted || !is_running_queue)
                return 0;
 
        for (request = request_queue_head; request; request = request->next) {
@@ -842,8 +665,6 @@ static void add_fetch_request(struct object *obj)
        request->url = NULL;
        request->lock = NULL;
        request->headers = NULL;
-       request->local_fileno = -1;
-       request->local_stream = NULL;
        request->state = NEED_FETCH;
        request->next = request_queue_head;
        request_queue_head = request;
@@ -870,7 +691,7 @@ static int add_send_request(struct object *obj, struct remote_lock *lock)
                get_remote_object_list(obj->sha1[0]);
        if (obj->flags & (REMOTE | PUSHING))
                return 0;
-       target = find_sha1_pack(obj->sha1, remote->packs);
+       target = find_sha1_pack(obj->sha1, repo->packs);
        if (target) {
                obj->flags |= REMOTE;
                return 0;
@@ -882,8 +703,6 @@ static int add_send_request(struct object *obj, struct remote_lock *lock)
        request->url = NULL;
        request->lock = lock;
        request->headers = NULL;
-       request->local_fileno = -1;
-       request->local_stream = NULL;
        request->state = NEED_PUSH;
        request->next = request_queue_head;
        request_queue_head = request;
@@ -896,176 +715,23 @@ static int add_send_request(struct object *obj, struct remote_lock *lock)
        return 1;
 }
 
-static int fetch_index(unsigned char *sha1)
-{
-       char *hex = sha1_to_hex(sha1);
-       char *filename;
-       char *url;
-       char tmpfile[PATH_MAX];
-       long prev_posn = 0;
-       char range[RANGE_HEADER_SIZE];
-       struct curl_slist *range_header = NULL;
-
-       FILE *indexfile;
-       struct active_request_slot *slot;
-       struct slot_results results;
-
-       /* Don't use the index if the pack isn't there */
-       url = xmalloc(strlen(remote->url) + 64);
-       sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
-       slot = get_active_slot();
-       slot->results = &results;
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
-       if (start_active_slot(slot)) {
-               run_active_slot(slot);
-               if (results.curl_result != CURLE_OK) {
-                       free(url);
-                       return error("Unable to verify pack %s is available",
-                                    hex);
-               }
-       } else {
-               free(url);
-               return error("Unable to start request");
-       }
-
-       if (has_pack_index(sha1)) {
-               free(url);
-               return 0;
-       }
-
-       if (push_verbosely)
-               fprintf(stderr, "Getting index for pack %s\n", hex);
-
-       sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
-
-       filename = sha1_pack_index_name(sha1);
-       snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
-       indexfile = fopen(tmpfile, "a");
-       if (!indexfile) {
-               free(url);
-               return error("Unable to open local file %s for pack index",
-                            tmpfile);
-       }
-
-       slot = get_active_slot();
-       slot->results = &results;
-       curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
-       slot->local = indexfile;
-
-       /* If there is data present from a previous transfer attempt,
-          resume where it left off */
-       prev_posn = ftell(indexfile);
-       if (prev_posn>0) {
-               if (push_verbosely)
-                       fprintf(stderr,
-                               "Resuming fetch of index for pack %s at byte %ld\n",
-                               hex, prev_posn);
-               sprintf(range, "Range: bytes=%ld-", prev_posn);
-               range_header = curl_slist_append(range_header, range);
-               curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
-       }
-
-       if (start_active_slot(slot)) {
-               run_active_slot(slot);
-               if (results.curl_result != CURLE_OK) {
-                       free(url);
-                       fclose(indexfile);
-                       return error("Unable to get pack index %s\n%s", url,
-                                    curl_errorstr);
-               }
-       } else {
-               free(url);
-               fclose(indexfile);
-               return error("Unable to start request");
-       }
-
-       free(url);
-       fclose(indexfile);
-
-       return move_temp_to_file(tmpfile, filename);
-}
-
-static int setup_index(unsigned char *sha1)
-{
-       struct packed_git *new_pack;
-
-       if (fetch_index(sha1))
-               return -1;
-
-       new_pack = parse_pack_index(sha1);
-       new_pack->next = remote->packs;
-       remote->packs = new_pack;
-       return 0;
-}
-
 static int fetch_indices(void)
 {
-       unsigned char sha1[20];
-       char *url;
-       struct strbuf buffer = STRBUF_INIT;
-       char *data;
-       int i = 0;
-
-       struct active_request_slot *slot;
-       struct slot_results results;
+       int ret;
 
        if (push_verbosely)
                fprintf(stderr, "Getting pack list\n");
 
-       url = xmalloc(strlen(remote->url) + 20);
-       sprintf(url, "%sobjects/info/packs", remote->url);
-
-       slot = get_active_slot();
-       slot->results = &results;
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
-       if (start_active_slot(slot)) {
-               run_active_slot(slot);
-               if (results.curl_result != CURLE_OK) {
-                       strbuf_release(&buffer);
-                       free(url);
-                       if (results.http_code == 404)
-                               return 0;
-                       else
-                               return error("%s", curl_errorstr);
-               }
-       } else {
-               strbuf_release(&buffer);
-               free(url);
-               return error("Unable to start request");
-       }
-       free(url);
-
-       data = buffer.buf;
-       while (i < buffer.len) {
-               switch (data[i]) {
-               case 'P':
-                       i++;
-                       if (i + 52 < buffer.len &&
-                           !prefixcmp(data + i, " pack-") &&
-                           !prefixcmp(data + i + 46, ".pack\n")) {
-                               get_sha1_hex(data + i + 6, sha1);
-                               setup_index(sha1);
-                               i += 51;
-                               break;
-                       }
-               default:
-                       while (data[i] != '\n')
-                               i++;
-               }
-               i++;
+       switch (http_get_info_packs(repo->url, &repo->packs)) {
+       case HTTP_OK:
+       case HTTP_MISSING_TARGET:
+               ret = 0;
+               break;
+       default:
+               ret = -1;
        }
 
-       strbuf_release(&buffer);
-       return 0;
+       return ret;
 }
 
 static void one_remote_object(const char *hex)
@@ -1111,6 +777,8 @@ static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
 {
        struct remote_lock *lock = (struct remote_lock *)ctx->userData;
+       git_SHA_CTX sha_ctx;
+       unsigned char lock_token_sha1[20];
 
        if (tag_closed && ctx->cdata) {
                if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
@@ -1123,6 +791,13 @@ static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
                } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
                        lock->token = xmalloc(strlen(ctx->cdata) + 1);
                        strcpy(lock->token, ctx->cdata);
+
+                       git_SHA1_Init(&sha_ctx);
+                       git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
+                       git_SHA1_Final(lock_token_sha1, &sha_ctx);
+
+                       lock->tmpfile_suffix[0] = '_';
+                       memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
                }
        }
 }
@@ -1194,12 +869,13 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
        struct remote_lock *lock = NULL;
        struct curl_slist *dav_headers = NULL;
        struct xml_ctx ctx;
+       char *escaped;
 
-       url = xmalloc(strlen(remote->url) + strlen(path) + 1);
-       sprintf(url, "%s%s", remote->url, path);
+       url = xmalloc(strlen(repo->url) + strlen(path) + 1);
+       sprintf(url, "%s%s", repo->url, path);
 
        /* Make sure leading directories exist for the remote ref */
-       ep = strchr(url + strlen(remote->url) + 1, '/');
+       ep = strchr(url + strlen(repo->url) + 1, '/');
        while (ep) {
                char saved_character = ep[1];
                ep[1] = '\0';
@@ -1228,7 +904,9 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
                ep = strchr(ep + 1, '/');
        }
 
-       strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
+       escaped = xml_entities(git_default_email);
+       strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
+       free(escaped);
 
        sprintf(timeout_header, "Timeout: Second-%ld", timeout);
        dav_headers = curl_slist_append(dav_headers, timeout_header);
@@ -1239,6 +917,10 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
        curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+#ifndef NO_CURL_IOCTL
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
+#endif
        curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
@@ -1291,8 +973,8 @@ static struct remote_lock *lock_remote(const char *path, long timeout)
        } else {
                lock->url = url;
                lock->start_time = time(NULL);
-               lock->next = remote->locks;
-               remote->locks = lock;
+               lock->next = repo->locks;
+               repo->locks = lock;
        }
 
        return lock;
@@ -1302,15 +984,11 @@ static int unlock_remote(struct remote_lock *lock)
 {
        struct active_request_slot *slot;
        struct slot_results results;
-       struct remote_lock *prev = remote->locks;
-       char *lock_token_header;
-       struct curl_slist *dav_headers = NULL;
+       struct remote_lock *prev = repo->locks;
+       struct curl_slist *dav_headers;
        int rc = 0;
 
-       lock_token_header = xmalloc(strlen(lock->token) + 31);
-       sprintf(lock_token_header, "Lock-Token: <%s>",
-               lock->token);
-       dav_headers = curl_slist_append(dav_headers, lock_token_header);
+       dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
 
        slot = get_active_slot();
        slot->results = &results;
@@ -1331,10 +1009,9 @@ static int unlock_remote(struct remote_lock *lock)
        }
 
        curl_slist_free_all(dav_headers);
-       free(lock_token_header);
 
-       if (remote->locks == lock) {
-               remote->locks = lock->next;
+       if (repo->locks == lock) {
+               repo->locks = lock->next;
        } else {
                while (prev && prev->next != lock)
                        prev = prev->next;
@@ -1352,7 +1029,7 @@ static int unlock_remote(struct remote_lock *lock)
 
 static void remove_locks(void)
 {
-       struct remote_lock *lock = remote->locks;
+       struct remote_lock *lock = repo->locks;
 
        fprintf(stderr, "Removing remote locks...\n");
        while (lock) {
@@ -1365,7 +1042,7 @@ static void remove_locks(void)
 static void remove_locks_on_signal(int signo)
 {
        remove_locks();
-       signal(signo, SIG_DFL);
+       sigchain_pop(signo);
        raise(signo);
 }
 
@@ -1435,7 +1112,7 @@ static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
                                }
                        }
                        if (path) {
-                               path += remote->path_len;
+                               path += repo->path_len;
                                ls->dentry_name = xstrdup(path);
                        }
                } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
@@ -1458,7 +1135,7 @@ static void remote_ls(const char *path, int flags,
                      void (*userFunc)(struct remote_ls_ctx *ls),
                      void *userData)
 {
-       char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
+       char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
        struct active_request_slot *slot;
        struct slot_results results;
        struct strbuf in_buffer = STRBUF_INIT;
@@ -1474,7 +1151,7 @@ static void remote_ls(const char *path, int flags,
        ls.userData = userData;
        ls.userFunc = userFunc;
 
-       sprintf(url, "%s%s", remote->url, path);
+       sprintf(url, "%s%s", repo->url, path);
 
        strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
 
@@ -1486,6 +1163,10 @@ static void remote_ls(const char *path, int flags,
        curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+#ifndef NO_CURL_IOCTL
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
+#endif
        curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
@@ -1551,8 +1232,11 @@ static int locking_available(void)
        struct curl_slist *dav_headers = NULL;
        struct xml_ctx ctx;
        int lock_flags = 0;
+       char *escaped;
 
-       strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
+       escaped = xml_entities(repo->url);
+       strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
+       free(escaped);
 
        dav_headers = curl_slist_append(dav_headers, "Depth: 0");
        dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
@@ -1562,9 +1246,13 @@ static int locking_available(void)
        curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+#ifndef NO_CURL_IOCTL
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
+#endif
        curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
+       curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
@@ -1594,16 +1282,16 @@ static int locking_available(void)
                        }
                        XML_ParserFree(parser);
                        if (!lock_flags)
-                               error("Error: no DAV locking support on %s",
-                                     remote->url);
+                               error("no DAV locking support on %s",
+                                     repo->url);
 
                } else {
                        error("Cannot access URL %s, return code %d",
-                             remote->url, results.curl_result);
+                             repo->url, results.curl_result);
                        lock_flags = 0;
                }
        } else {
-               error("Unable to start PROPFIND request on %s", remote->url);
+               error("Unable to start PROPFIND request on %s", repo->url);
        }
 
        strbuf_release(&out_buffer.buf);
@@ -1732,13 +1420,10 @@ static int update_remote(unsigned char *sha1, struct remote_lock *lock)
 {
        struct active_request_slot *slot;
        struct slot_results results;
-       char *if_header;
        struct buffer out_buffer = { STRBUF_INIT, 0 };
-       struct curl_slist *dav_headers = NULL;
+       struct curl_slist *dav_headers;
 
-       if_header = xmalloc(strlen(lock->token) + 25);
-       sprintf(if_header, "If: (<%s>)", lock->token);
-       dav_headers = curl_slist_append(dav_headers, if_header);
+       dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
 
        strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
 
@@ -1747,6 +1432,10 @@ static int update_remote(unsigned char *sha1, struct remote_lock *lock)
        curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+#ifndef NO_CURL_IOCTL
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
+       curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
+#endif
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
@@ -1757,7 +1446,6 @@ static int update_remote(unsigned char *sha1, struct remote_lock *lock)
        if (start_active_slot(slot)) {
                run_active_slot(slot);
                strbuf_release(&out_buffer.buf);
-               free(if_header);
                if (results.curl_result != CURLE_OK) {
                        fprintf(stderr,
                                "PUT error: curl result=%d, HTTP code=%ld\n",
@@ -1767,7 +1455,6 @@ static int update_remote(unsigned char *sha1, struct remote_lock *lock)
                }
        } else {
                strbuf_release(&out_buffer.buf);
-               free(if_header);
                fprintf(stderr, "Unable to start PUT request\n");
                return 0;
        }
@@ -1775,20 +1462,7 @@ static int update_remote(unsigned char *sha1, struct remote_lock *lock)
        return 1;
 }
 
-static struct ref *local_refs, **local_tail;
-static struct ref *remote_refs, **remote_tail;
-
-static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
-{
-       struct ref *ref;
-       int len = strlen(refname) + 1;
-       ref = xcalloc(1, sizeof(*ref) + len);
-       hashcpy(ref->new_sha1, sha1);
-       memcpy(ref->name, refname, len);
-       *local_tail = ref;
-       local_tail = &ref->next;
-       return 0;
-}
+static struct ref *remote_refs;
 
 static void one_remote_ref(char *refname)
 {
@@ -1797,10 +1471,10 @@ static void one_remote_ref(char *refname)
 
        ref = alloc_ref(refname);
 
-       if (http_fetch_ref(remote->url, ref) != 0) {
+       if (http_fetch_ref(repo->url, ref) != 0) {
                fprintf(stderr,
                        "Unable to fetch ref %s from %s\n",
-                       refname, remote->url);
+                       refname, repo->url);
                free(ref);
                return;
        }
@@ -1809,7 +1483,7 @@ static void one_remote_ref(char *refname)
         * Fetch a copy of the object if it doesn't exist locally - it
         * may be required for updating server info later.
         */
-       if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
+       if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
                obj = lookup_unknown_object(ref->old_sha1);
                if (obj) {
                        fprintf(stderr, "  fetch %s for %s\n",
@@ -1818,82 +1492,15 @@ static void one_remote_ref(char *refname)
                }
        }
 
-       *remote_tail = ref;
-       remote_tail = &ref->next;
-}
-
-static void get_local_heads(void)
-{
-       local_tail = &local_refs;
-       for_each_ref(one_local_ref, NULL);
+       ref->next = remote_refs;
+       remote_refs = ref;
 }
 
 static void get_dav_remote_heads(void)
 {
-       remote_tail = &remote_refs;
        remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
 }
 
-static int is_zero_sha1(const unsigned char *sha1)
-{
-       int i;
-
-       for (i = 0; i < 20; i++) {
-               if (*sha1++)
-                       return 0;
-       }
-       return 1;
-}
-
-static void unmark_and_free(struct commit_list *list, unsigned int mark)
-{
-       while (list) {
-               struct commit_list *temp = list;
-               temp->item->object.flags &= ~mark;
-               list = temp->next;
-               free(temp);
-       }
-}
-
-static int ref_newer(const unsigned char *new_sha1,
-                    const unsigned char *old_sha1)
-{
-       struct object *o;
-       struct commit *old, *new;
-       struct commit_list *list, *used;
-       int found = 0;
-
-       /* Both new and old must be commit-ish and new is descendant of
-        * old.  Otherwise we require --force.
-        */
-       o = deref_tag(parse_object(old_sha1), NULL, 0);
-       if (!o || o->type != OBJ_COMMIT)
-               return 0;
-       old = (struct commit *) o;
-
-       o = deref_tag(parse_object(new_sha1), NULL, 0);
-       if (!o || o->type != OBJ_COMMIT)
-               return 0;
-       new = (struct commit *) o;
-
-       if (parse_commit(new) < 0)
-               return 0;
-
-       used = list = NULL;
-       commit_list_insert(new, &list);
-       while (list) {
-               new = pop_most_recent_commit(&list, TMP_MARK);
-               commit_list_insert(new, &used);
-               if (new == old) {
-                       found = 1;
-                       break;
-               }
-       }
-       unmark_and_free(list, TMP_MARK);
-       unmark_and_free(used, TMP_MARK);
-       return found;
-}
-
 static void add_remote_info_ref(struct remote_ls_ctx *ls)
 {
        struct strbuf *buf = (struct strbuf *)ls->userData;
@@ -1904,10 +1511,10 @@ static void add_remote_info_ref(struct remote_ls_ctx *ls)
 
        ref = alloc_ref(ls->dentry_name);
 
-       if (http_fetch_ref(remote->url, ref) != 0) {
+       if (http_fetch_ref(repo->url, ref) != 0) {
                fprintf(stderr,
                        "Unable to fetch ref %s from %s\n",
-                       ls->dentry_name, remote->url);
+                       ls->dentry_name, repo->url);
                aborted = 1;
                free(ref);
                return;
@@ -1949,21 +1556,22 @@ static void update_remote_info_refs(struct remote_lock *lock)
        struct buffer buffer = { STRBUF_INIT, 0 };
        struct active_request_slot *slot;
        struct slot_results results;
-       char *if_header;
-       struct curl_slist *dav_headers = NULL;
+       struct curl_slist *dav_headers;
 
        remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
                  add_remote_info_ref, &buffer.buf);
        if (!aborted) {
-               if_header = xmalloc(strlen(lock->token) + 25);
-               sprintf(if_header, "If: (<%s>)", lock->token);
-               dav_headers = curl_slist_append(dav_headers, if_header);
+               dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
 
                slot = get_active_slot();
                slot->results = &results;
                curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
                curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
                curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+#ifndef NO_CURL_IOCTL
+               curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
+               curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
+#endif
                curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
                curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
                curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
@@ -1979,37 +1587,29 @@ static void update_remote_info_refs(struct remote_lock *lock)
                                        results.curl_result, results.http_code);
                        }
                }
-               free(if_header);
        }
        strbuf_release(&buffer.buf);
 }
 
 static int remote_exists(const char *path)
 {
-       char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
-       struct active_request_slot *slot;
-       struct slot_results results;
-       int ret = -1;
+       char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
+       int ret;
 
-       sprintf(url, "%s%s", remote->url, path);
+       sprintf(url, "%s%s", repo->url, path);
 
-       slot = get_active_slot();
-       slot->results = &results;
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
-
-       if (start_active_slot(slot)) {
-               run_active_slot(slot);
-               if (results.http_code == 404)
-                       ret = 0;
-               else if (results.curl_result == CURLE_OK)
-                       ret = 1;
-               else
-                       fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
-       } else {
-               fprintf(stderr, "Unable to start HEAD request\n");
+       switch (http_get_strbuf(url, NULL, 0)) {
+       case HTTP_OK:
+               ret = 1;
+               break;
+       case HTTP_MISSING_TARGET:
+               ret = 0;
+               break;
+       case HTTP_ERROR:
+               http_error(url, HTTP_ERROR);
+       default:
+               ret = -1;
        }
-
        free(url);
        return ret;
 }
@@ -2018,27 +1618,13 @@ static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
 {
        char *url;
        struct strbuf buffer = STRBUF_INIT;
-       struct active_request_slot *slot;
-       struct slot_results results;
 
-       url = xmalloc(strlen(remote->url) + strlen(path) + 1);
-       sprintf(url, "%s%s", remote->url, path);
+       url = xmalloc(strlen(repo->url) + strlen(path) + 1);
+       sprintf(url, "%s%s", repo->url, path);
 
-       slot = get_active_slot();
-       slot->results = &results;
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
-       curl_easy_setopt(slot->curl, CURLOPT_URL, url);
-       if (start_active_slot(slot)) {
-               run_active_slot(slot);
-               if (results.curl_result != CURLE_OK) {
-                       die("Couldn't get %s for remote symref\n%s",
-                           url, curl_errorstr);
-               }
-       } else {
-               die("Unable to start remote symref request");
-       }
+       if (http_get_strbuf(url, &buffer, 0) != HTTP_OK)
+               die("Couldn't get %s for remote symref\n%s", url,
+                   curl_errorstr);
        free(url);
 
        free(*symref);
@@ -2119,13 +1705,13 @@ static int delete_remote_branch(char *pattern, int force)
                /* Remote HEAD must resolve to a known object */
                if (symref)
                        return error("Remote HEAD symrefs too deep");
-               if (is_zero_sha1(head_sha1))
+               if (is_null_sha1(head_sha1))
                        return error("Unable to resolve remote HEAD");
                if (!has_sha1_file(head_sha1))
                        return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
 
                /* Remote branch must resolve to a known object */
-               if (is_zero_sha1(remote_ref->old_sha1))
+               if (is_null_sha1(remote_ref->old_sha1))
                        return error("Unable to resolve remote branch %s",
                                     remote_ref->name);
                if (!has_sha1_file(remote_ref->old_sha1))
@@ -2137,7 +1723,7 @@ static int delete_remote_branch(char *pattern, int force)
                                     "of your current HEAD.\n"
                                     "If you are sure you want to delete it,"
                                     " run:\n\t'git http-push -D %s %s'",
-                                    remote_ref->name, remote->url, pattern);
+                                    remote_ref->name, repo->url, pattern);
                }
        }
 
@@ -2145,8 +1731,8 @@ static int delete_remote_branch(char *pattern, int force)
        fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
        if (dry_run)
                return 0;
-       url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
-       sprintf(url, "%s%s", remote->url, remote_ref->name);
+       url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
+       sprintf(url, "%s%s", repo->url, remote_ref->name);
        slot = get_active_slot();
        slot->results = &results;
        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
@@ -2167,6 +1753,25 @@ static int delete_remote_branch(char *pattern, int force)
        return 0;
 }
 
+static void run_request_queue(void)
+{
+#ifdef USE_CURL_MULTI
+       is_running_queue = 1;
+       fill_active_slots();
+       add_fill_function(NULL, fill_active_slot);
+#endif
+       do {
+               finish_all_active_slots();
+#ifdef USE_CURL_MULTI
+               fill_active_slots();
+#endif
+       } while (request_queue_head && !aborted);
+
+#ifdef USE_CURL_MULTI
+       is_running_queue = 0;
+#endif
+}
+
 int main(int argc, char **argv)
 {
        struct transfer_request *request;
@@ -2182,12 +1787,13 @@ int main(int argc, char **argv)
        int rc = 0;
        int i;
        int new_refs;
-       struct ref *ref;
+       struct ref *ref, *local_refs;
+       struct remote *remote;
        char *rewritten_url = NULL;
 
-       setup_git_directory();
+       git_extract_argv0_path(argv[0]);
 
-       remote = xcalloc(sizeof(*remote), 1);
+       repo = xcalloc(sizeof(*repo), 1);
 
        argv++;
        for (i = 1; i < argc; i++, argv++) {
@@ -2206,8 +1812,13 @@ int main(int argc, char **argv)
                                dry_run = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "--helper-status")) {
+                               helper_status = 1;
+                               continue;
+                       }
                        if (!strcmp(arg, "--verbose")) {
                                push_verbosely = 1;
+                               http_is_verbose = 1;
                                continue;
                        }
                        if (!strcmp(arg, "-d")) {
@@ -2219,15 +1830,17 @@ int main(int argc, char **argv)
                                force_delete = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "-h"))
+                               usage(http_push_usage);
                }
-               if (!remote->url) {
+               if (!repo->url) {
                        char *path = strstr(arg, "//");
-                       remote->url = arg;
-                       remote->path_len = strlen(arg);
+                       repo->url = arg;
+                       repo->path_len = strlen(arg);
                        if (path) {
-                               remote->path = strchr(path+2, '/');
-                               if (remote->path)
-                                       remote->path_len = strlen(remote->path);
+                               repo->path = strchr(path+2, '/');
+                               if (repo->path)
+                                       repo->path_len = strlen(repo->path);
                        }
                        continue;
                }
@@ -2240,78 +1853,90 @@ int main(int argc, char **argv)
        die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
 #endif
 
-       if (!remote->url)
+       if (!repo->url)
                usage(http_push_usage);
 
        if (delete_branch && nr_refspec != 1)
                die("You must specify only one branch name when deleting a remote branch");
 
-       memset(remote_dir_exists, -1, 256);
+       setup_git_directory();
 
-       http_init(NULL);
+       memset(remote_dir_exists, -1, 256);
 
-       no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
+       /*
+        * Create a minimum remote by hand to give to http_init(),
+        * primarily to allow it to look at the URL.
+        */
+       remote = xcalloc(sizeof(*remote), 1);
+       ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
+       remote->url[remote->url_nr++] = repo->url;
+       http_init(remote);
 
-       if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
-               rewritten_url = xmalloc(strlen(remote->url)+2);
-               strcpy(rewritten_url, remote->url);
+       if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
+               rewritten_url = xmalloc(strlen(repo->url)+2);
+               strcpy(rewritten_url, repo->url);
                strcat(rewritten_url, "/");
-               remote->path = rewritten_url + (remote->path - remote->url);
-               remote->path_len++;
-               remote->url = rewritten_url;
+               repo->path = rewritten_url + (repo->path - repo->url);
+               repo->path_len++;
+               repo->url = rewritten_url;
        }
 
+#ifdef USE_CURL_MULTI
+       is_running_queue = 0;
+#endif
+
        /* Verify DAV compliance/lock support */
        if (!locking_available()) {
                rc = 1;
                goto cleanup;
        }
 
-       signal(SIGINT, remove_locks_on_signal);
-       signal(SIGHUP, remove_locks_on_signal);
-       signal(SIGQUIT, remove_locks_on_signal);
-       signal(SIGTERM, remove_locks_on_signal);
+       sigchain_push_common(remove_locks_on_signal);
 
        /* Check whether the remote has server info files */
-       remote->can_update_info_refs = 0;
-       remote->has_info_refs = remote_exists("info/refs");
-       remote->has_info_packs = remote_exists("objects/info/packs");
-       if (remote->has_info_refs) {
+       repo->can_update_info_refs = 0;
+       repo->has_info_refs = remote_exists("info/refs");
+       repo->has_info_packs = remote_exists("objects/info/packs");
+       if (repo->has_info_refs) {
                info_ref_lock = lock_remote("info/refs", LOCK_TIME);
                if (info_ref_lock)
-                       remote->can_update_info_refs = 1;
+                       repo->can_update_info_refs = 1;
                else {
-                       fprintf(stderr, "Error: cannot lock existing info/refs\n");
+                       error("cannot lock existing info/refs");
                        rc = 1;
                        goto cleanup;
                }
        }
-       if (remote->has_info_packs)
+       if (repo->has_info_packs)
                fetch_indices();
 
        /* Get a list of all local and remote heads to validate refspecs */
-       get_local_heads();
+       local_refs = get_local_heads();
        fprintf(stderr, "Fetching remote heads...\n");
        get_dav_remote_heads();
+       run_request_queue();
 
        /* Remove a remote branch if -d or -D was specified */
        if (delete_branch) {
-               if (delete_remote_branch(refspec[0], force_delete) == -1)
+               if (delete_remote_branch(refspec[0], force_delete) == -1) {
                        fprintf(stderr, "Unable to delete remote branch %s\n",
                                refspec[0]);
+                       if (helper_status)
+                               printf("error %s cannot remove\n", refspec[0]);
+               }
                goto cleanup;
        }
 
        /* match them up */
-       if (!remote_tail)
-               remote_tail = &remote_refs;
-       if (match_refs(local_refs, remote_refs, &remote_tail,
+       if (match_refs(local_refs, &remote_refs,
                       nr_refspec, (const char **) refspec, push_all)) {
                rc = -1;
                goto cleanup;
        }
        if (!remote_refs) {
                fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
+               if (helper_status)
+                       printf("error null no match\n");
                rc = 0;
                goto cleanup;
        }
@@ -2319,18 +1944,22 @@ int main(int argc, char **argv)
        new_refs = 0;
        for (ref = remote_refs; ref; ref = ref->next) {
                char old_hex[60], *new_hex;
-               const char *commit_argv[4];
+               const char *commit_argv[5];
                int commit_argc;
                char *new_sha1_hex, *old_sha1_hex;
 
                if (!ref->peer_ref)
                        continue;
 
-               if (is_zero_sha1(ref->peer_ref->new_sha1)) {
+               if (is_null_sha1(ref->peer_ref->new_sha1)) {
                        if (delete_remote_branch(ref->name, 1) == -1) {
                                error("Could not remove %s", ref->name);
+                               if (helper_status)
+                                       printf("error %s cannot remove\n", ref->name);
                                rc = -4;
                        }
+                       else if (helper_status)
+                               printf("ok %s\n", ref->name);
                        new_refs++;
                        continue;
                }
@@ -2338,11 +1967,13 @@ int main(int argc, char **argv)
                if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
                        if (push_verbosely || 1)
                                fprintf(stderr, "'%s': up-to-date\n", ref->name);
+                       if (helper_status)
+                               printf("ok %s up to date\n", ref->name);
                        continue;
                }
 
                if (!force_all &&
-                   !is_zero_sha1(ref->old_sha1) &&
+                   !is_null_sha1(ref->old_sha1) &&
                    !ref->force) {
                        if (!has_sha1_file(ref->old_sha1) ||
                            !ref_newer(ref->peer_ref->new_sha1,
@@ -2361,6 +1992,8 @@ int main(int argc, char **argv)
                                      "need to pull first?",
                                      ref->name,
                                      ref->peer_ref->name);
+                               if (helper_status)
+                                       printf("error %s non-fast forward\n", ref->name);
                                rc = -2;
                                continue;
                        }
@@ -2374,14 +2007,19 @@ int main(int argc, char **argv)
                if (strcmp(ref->name, ref->peer_ref->name))
                        fprintf(stderr, " using '%s'", ref->peer_ref->name);
                fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
-               if (dry_run)
+               if (dry_run) {
+                       if (helper_status)
+                               printf("ok %s\n", ref->name);
                        continue;
+               }
 
                /* Lock remote branch ref */
                ref_lock = lock_remote(ref->name, LOCK_TIME);
                if (ref_lock == NULL) {
                        fprintf(stderr, "Unable to lock remote branch %s\n",
                                ref->name);
+                       if (helper_status)
+                               printf("error %s lock error\n", ref->name);
                        rc = 1;
                        continue;
                }
@@ -2392,13 +2030,14 @@ int main(int argc, char **argv)
                old_sha1_hex = NULL;
                commit_argv[1] = "--objects";
                commit_argv[2] = new_sha1_hex;
-               if (!push_all && !is_zero_sha1(ref->old_sha1)) {
+               if (!push_all && !is_null_sha1(ref->old_sha1)) {
                        old_sha1_hex = xmalloc(42);
                        sprintf(old_sha1_hex, "^%s",
                                sha1_to_hex(ref->old_sha1));
                        commit_argv[3] = old_sha1_hex;
                        commit_argc++;
                }
+               commit_argv[commit_argc] = NULL;
                init_revisions(&revs, setup_git_directory());
                setup_revisions(commit_argc, commit_argv, &revs, NULL);
                revs.edge_hint = 0; /* just in case */
@@ -2422,16 +2061,8 @@ int main(int argc, char **argv)
                if (objects_to_send)
                        fprintf(stderr, "    sending %d objects\n",
                                objects_to_send);
-#ifdef USE_CURL_MULTI
-               fill_active_slots();
-               add_fill_function(NULL, fill_active_slot);
-#endif
-               do {
-                       finish_all_active_slots();
-#ifdef USE_CURL_MULTI
-                       fill_active_slots();
-#endif
-               } while (request_queue_head && !aborted);
+
+               run_request_queue();
 
                /* Update the remote branch if all went well */
                if (aborted || !update_remote(ref->new_sha1, ref_lock))
@@ -2439,13 +2070,15 @@ int main(int argc, char **argv)
 
                if (!rc)
                        fprintf(stderr, "    done\n");
+               if (helper_status)
+                       printf("%s %s\n", !rc ? "ok" : "error", ref->name);
                unlock_remote(ref_lock);
                check_locks();
        }
 
        /* Update remote server info if appropriate */
-       if (remote->has_info_refs && new_refs) {
-               if (info_ref_lock && remote->can_update_info_refs) {
+       if (repo->has_info_refs && new_refs) {
+               if (info_ref_lock && repo->can_update_info_refs) {
                        fprintf(stderr, "Updating remote server info\n");
                        if (!dry_run)
                                update_remote_info_refs(info_ref_lock);
@@ -2458,9 +2091,7 @@ int main(int argc, char **argv)
        free(rewritten_url);
        if (info_ref_lock)
                unlock_remote(info_ref_lock);
-       free(remote);
-
-       curl_slist_free_all(no_pragma_header);
+       free(repo);
 
        http_cleanup();