improve base85 generated assembly code
[gitweb.git] / http-fetch.c
index b8aa965ea32f2956fc162d0a3cee9923808e165f..861644b27ee0c01a780b68daa43c259dd978a538 100644 (file)
@@ -2,48 +2,49 @@
 #include "commit.h"
 #include "pack.h"
 #include "fetch.h"
-
-#include <curl/curl.h>
-#include <curl/easy.h>
-
-#if LIBCURL_VERSION_NUM >= 0x070908
-#define USE_CURL_MULTI
-#define DEFAULT_MAX_REQUESTS 5
+#include "http.h"
+
+#ifndef NO_EXPAT
+#include <expat.h>
+
+/* Definitions for DAV requests */
+#define DAV_PROPFIND "PROPFIND"
+#define DAV_PROPFIND_RESP ".multistatus.response"
+#define DAV_PROPFIND_NAME ".multistatus.response.href"
+#define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
+#define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
+
+/* Definitions for processing XML DAV responses */
+#ifndef XML_STATUS_OK
+enum XML_Status {
+  XML_STATUS_OK = 1,
+  XML_STATUS_ERROR = 0
+};
+#define XML_STATUS_OK    1
+#define XML_STATUS_ERROR 0
 #endif
 
-#if LIBCURL_VERSION_NUM < 0x070704
-#define curl_global_cleanup() do { /* nothing */ } while(0)
-#endif
-#if LIBCURL_VERSION_NUM < 0x070800
-#define curl_global_init(a) do { /* nothing */ } while(0)
-#endif
+/* Flags that control remote_ls processing */
+#define PROCESS_FILES (1u << 0)
+#define PROCESS_DIRS  (1u << 1)
+#define RECURSIVE     (1u << 2)
 
-#if LIBCURL_VERSION_NUM < 0x070c04
-#define NO_CURL_EASY_DUPHANDLE
+/* Flags that remote_ls passes to callback functions */
+#define IS_DIR (1u << 0)
 #endif
 
 #define PREV_BUF_SIZE 4096
 #define RANGE_HEADER_SIZE 30
 
 static int got_alternates = -1;
-static int active_requests = 0;
-static int data_received;
+static int corrupt_object_found = 0;
 
-#ifdef USE_CURL_MULTI
-static int max_requests = -1;
-static CURLM *curlm;
-#endif
-#ifndef NO_CURL_EASY_DUPHANDLE
-static CURL *curl_default;
-#endif
-static struct curl_slist *pragma_header;
 static struct curl_slist *no_pragma_header;
-static struct curl_slist *no_range_header;
-static char curl_errorstr[CURL_ERROR_SIZE];
 
 struct alt_base
 {
        char *base;
+       int path_len;
        int got_indices;
        struct packed_git *packs;
        struct alt_base *next;
@@ -51,14 +52,14 @@ struct alt_base
 
 static struct alt_base *alt = NULL;
 
-enum transfer_state {
+enum object_request_state {
        WAITING,
        ABORTED,
        ACTIVE,
        COMPLETE,
 };
 
-struct transfer_request
+struct object_request
 {
        unsigned char sha1[20];
        struct alt_base *repo;
@@ -66,7 +67,7 @@ struct transfer_request
        char filename[PATH_MAX];
        char tmpfile[PATH_MAX];
        int local;
-       enum transfer_state state;
+       enum object_request_state state;
        CURLcode curl_result;
        char errorstr[CURL_ERROR_SIZE];
        long http_code;
@@ -76,23 +77,10 @@ struct transfer_request
        int zret;
        int rename;
        struct active_request_slot *slot;
-       struct transfer_request *next;
-};
-
-struct active_request_slot
-{
-       CURL *curl;
-       FILE *local;
-       int in_use;
-       int done;
-       CURLcode curl_result;
-       long http_code;
-       void *callback_data;
-       void (*callback_func)(void *data);
-       struct active_request_slot *next;
+       struct object_request *next;
 };
 
-struct alt_request {
+struct alternates_request {
        char *base;
        char *url;
        struct buffer *buffer;
@@ -100,120 +88,31 @@ struct alt_request {
        int http_specific;
 };
 
-static struct transfer_request *request_queue_head = NULL;
-static struct active_request_slot *active_queue_head = NULL;
-
-static int curl_ssl_verify = -1;
-static char *ssl_cert = NULL;
-#if LIBCURL_VERSION_NUM >= 0x070902
-static char *ssl_key = NULL;
-#endif
-#if LIBCURL_VERSION_NUM >= 0x070908
-static char *ssl_capath = NULL;
-#endif
-static char *ssl_cainfo = NULL;
-static long curl_low_speed_limit = -1;
-static long curl_low_speed_time = -1;
-
-struct buffer
+#ifndef NO_EXPAT
+struct xml_ctx
 {
-        size_t posn;
-        size_t size;
-        void *buffer;
+       char *name;
+       int len;
+       char *cdata;
+       void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
+       void *userData;
 };
 
-static int http_options(const char *var, const char *value)
+struct remote_ls_ctx
 {
-       if (!strcmp("http.sslverify", var)) {
-               if (curl_ssl_verify == -1) {
-                       curl_ssl_verify = git_config_bool(var, value);
-               }
-               return 0;
-       }
-
-       if (!strcmp("http.sslcert", var)) {
-               if (ssl_cert == NULL) {
-                       ssl_cert = xmalloc(strlen(value)+1);
-                       strcpy(ssl_cert, value);
-               }
-               return 0;
-       }
-#if LIBCURL_VERSION_NUM >= 0x070902
-       if (!strcmp("http.sslkey", var)) {
-               if (ssl_key == NULL) {
-                       ssl_key = xmalloc(strlen(value)+1);
-                       strcpy(ssl_key, value);
-               }
-               return 0;
-       }
-#endif
-#if LIBCURL_VERSION_NUM >= 0x070908
-       if (!strcmp("http.sslcapath", var)) {
-               if (ssl_capath == NULL) {
-                       ssl_capath = xmalloc(strlen(value)+1);
-                       strcpy(ssl_capath, value);
-               }
-               return 0;
-       }
-#endif
-       if (!strcmp("http.sslcainfo", var)) {
-               if (ssl_cainfo == NULL) {
-                       ssl_cainfo = xmalloc(strlen(value)+1);
-                       strcpy(ssl_cainfo, value);
-               }
-               return 0;
-       }
-
-#ifdef USE_CURL_MULTI  
-       if (!strcmp("http.maxrequests", var)) {
-               if (max_requests == -1)
-                       max_requests = git_config_int(var, value);
-               return 0;
-       }
+       struct alt_base *repo;
+       char *path;
+       void (*userFunc)(struct remote_ls_ctx *ls);
+       void *userData;
+       int flags;
+       char *dentry_name;
+       int dentry_flags;
+       int rc;
+       struct remote_ls_ctx *parent;
+};
 #endif
 
-       if (!strcmp("http.lowspeedlimit", var)) {
-               if (curl_low_speed_limit == -1)
-                       curl_low_speed_limit = (long)git_config_int(var, value);
-               return 0;
-       }
-       if (!strcmp("http.lowspeedtime", var)) {
-               if (curl_low_speed_time == -1)
-                       curl_low_speed_time = (long)git_config_int(var, value);
-               return 0;
-       }
-
-       /* Fall back on the default ones */
-       return git_default_config(var, value);
-}
-
-static size_t fwrite_buffer(void *ptr, size_t eltsize, size_t nmemb,
-                            struct buffer *buffer)
-{
-        size_t size = eltsize * nmemb;
-        if (size > buffer->size - buffer->posn)
-                size = buffer->size - buffer->posn;
-        memcpy(buffer->buffer + buffer->posn, ptr, size);
-        buffer->posn += size;
-       data_received++;
-        return size;
-}
-
-static size_t fwrite_buffer_dynamic(const void *ptr, size_t eltsize,
-                                   size_t nmemb, struct buffer *buffer)
-{
-       size_t size = eltsize * nmemb;
-       if (size > buffer->size - buffer->posn) {
-               buffer->size = buffer->size * 3 / 2;
-               if (buffer->size < buffer->posn + size)
-                       buffer->size = buffer->posn + size;
-               buffer->buffer = xrealloc(buffer->buffer, buffer->size);
-       }
-       memcpy(buffer->buffer + buffer->posn, ptr, size);
-       buffer->posn += size;
-       data_received++;
-       return size;
-}
+static struct object_request *object_queue_head = NULL;
 
 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
                               void *data)
@@ -221,194 +120,35 @@ static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
        unsigned char expn[4096];
        size_t size = eltsize * nmemb;
        int posn = 0;
-       struct transfer_request *request = (struct transfer_request *)data;
+       struct object_request *obj_req = (struct object_request *)data;
        do {
-               ssize_t retval = write(request->local,
+               ssize_t retval = write(obj_req->local,
                                       ptr + posn, size - posn);
                if (retval < 0)
                        return posn;
                posn += retval;
        } while (posn < size);
 
-       request->stream.avail_in = size;
-       request->stream.next_in = ptr;
+       obj_req->stream.avail_in = size;
+       obj_req->stream.next_in = ptr;
        do {
-               request->stream.next_out = expn;
-               request->stream.avail_out = sizeof(expn);
-               request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
-               SHA1_Update(&request->c, expn,
-                           sizeof(expn) - request->stream.avail_out);
-       } while (request->stream.avail_in && request->zret == Z_OK);
+               obj_req->stream.next_out = expn;
+               obj_req->stream.avail_out = sizeof(expn);
+               obj_req->zret = inflate(&obj_req->stream, Z_SYNC_FLUSH);
+               SHA1_Update(&obj_req->c, expn,
+                           sizeof(expn) - obj_req->stream.avail_out);
+       } while (obj_req->stream.avail_in && obj_req->zret == Z_OK);
        data_received++;
        return size;
 }
 
-#ifdef USE_CURL_MULTI
-static void process_curl_messages(void);
-static void process_request_queue(void);
-#endif
 static void fetch_alternates(char *base);
 
-static CURL* get_curl_handle(void)
-{
-       CURL* result = curl_easy_init();
-
-       curl_easy_setopt(result, CURLOPT_SSL_VERIFYPEER, curl_ssl_verify);
-#if LIBCURL_VERSION_NUM >= 0x070907
-       curl_easy_setopt(result, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
-#endif
-
-       if (ssl_cert != NULL)
-               curl_easy_setopt(result, CURLOPT_SSLCERT, ssl_cert);
-#if LIBCURL_VERSION_NUM >= 0x070902
-       if (ssl_key != NULL)
-               curl_easy_setopt(result, CURLOPT_SSLKEY, ssl_key);
-#endif
-#if LIBCURL_VERSION_NUM >= 0x070908
-       if (ssl_capath != NULL)
-               curl_easy_setopt(result, CURLOPT_CAPATH, ssl_capath);
-#endif
-       if (ssl_cainfo != NULL)
-               curl_easy_setopt(result, CURLOPT_CAINFO, ssl_cainfo);
-       curl_easy_setopt(result, CURLOPT_FAILONERROR, 1);
-
-       if (curl_low_speed_limit > 0 && curl_low_speed_time > 0) {
-               curl_easy_setopt(result, CURLOPT_LOW_SPEED_LIMIT,
-                                curl_low_speed_limit);
-               curl_easy_setopt(result, CURLOPT_LOW_SPEED_TIME,
-                                curl_low_speed_time);
-       }
-
-       curl_easy_setopt(result, CURLOPT_FOLLOWLOCATION, 1);
-
-       return result;
-}
+static void process_object_response(void *callback_data);
 
-static struct active_request_slot *get_active_slot(void)
+static void start_object_request(struct object_request *obj_req)
 {
-       struct active_request_slot *slot = active_queue_head;
-       struct active_request_slot *newslot;
-
-#ifdef USE_CURL_MULTI
-       int num_transfers;
-
-       /* Wait for a slot to open up if the queue is full */
-       while (active_requests >= max_requests) {
-               curl_multi_perform(curlm, &num_transfers);
-               if (num_transfers < active_requests) {
-                       process_curl_messages();
-               }
-       }
-#endif
-
-       while (slot != NULL && slot->in_use) {
-               slot = slot->next;
-       }
-       if (slot == NULL) {
-               newslot = xmalloc(sizeof(*newslot));
-               newslot->curl = NULL;
-               newslot->in_use = 0;
-               newslot->next = NULL;
-
-               slot = active_queue_head;
-               if (slot == NULL) {
-                       active_queue_head = newslot;
-               } else {
-                       while (slot->next != NULL) {
-                               slot = slot->next;
-                       }
-                       slot->next = newslot;
-               }
-               slot = newslot;
-       }
-
-       if (slot->curl == NULL) {
-#ifdef NO_CURL_EASY_DUPHANDLE
-               slot->curl = get_curl_handle();
-#else
-               slot->curl = curl_easy_duphandle(curl_default);
-#endif
-       }
-
-       active_requests++;
-       slot->in_use = 1;
-       slot->done = 0;
-       slot->local = NULL;
-       slot->callback_data = NULL;
-       slot->callback_func = NULL;
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, pragma_header);
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_range_header);
-       curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, curl_errorstr);
-
-       return slot;
-}
-
-static int start_active_slot(struct active_request_slot *slot)
-{
-#ifdef USE_CURL_MULTI
-       CURLMcode curlm_result = curl_multi_add_handle(curlm, slot->curl);
-
-       if (curlm_result != CURLM_OK &&
-           curlm_result != CURLM_CALL_MULTI_PERFORM) {
-               active_requests--;
-               slot->in_use = 0;
-               return 0;
-       }
-#endif
-       return 1;
-}
-
-static void run_active_slot(struct active_request_slot *slot)
-{
-#ifdef USE_CURL_MULTI
-       int num_transfers;
-       long last_pos = 0;
-       long current_pos;
-       fd_set readfds;
-       fd_set writefds;
-       fd_set excfds;
-       int max_fd;
-       struct timeval select_timeout;
-       CURLMcode curlm_result;
-
-       while (!slot->done) {
-               data_received = 0;
-               do {
-                       curlm_result = curl_multi_perform(curlm,
-                                                         &num_transfers);
-               } while (curlm_result == CURLM_CALL_MULTI_PERFORM);
-               if (num_transfers < active_requests) {
-                       process_curl_messages();
-                       process_request_queue();
-               }
-
-               if (!data_received && slot->local != NULL) {
-                       current_pos = ftell(slot->local);
-                       if (current_pos > last_pos)
-                               data_received++;
-                       last_pos = current_pos;
-               }
-
-               if (!slot->done && !data_received) {
-                       max_fd = 0;
-                       FD_ZERO(&readfds);
-                       FD_ZERO(&writefds);
-                       FD_ZERO(&excfds);
-                       select_timeout.tv_sec = 0;
-                       select_timeout.tv_usec = 50000;
-                       select(max_fd, &readfds, &writefds,
-                              &excfds, &select_timeout);
-               }
-       }
-#else
-       slot->curl_result = curl_easy_perform(slot->curl);
-       active_requests--;
-#endif
-}
-
-static void start_request(struct transfer_request *request)
-{
-       char *hex = sha1_to_hex(request->sha1);
+       char *hex = sha1_to_hex(obj_req->sha1);
        char prevfile[PATH_MAX];
        char *url;
        char *posn;
@@ -420,51 +160,53 @@ static void start_request(struct transfer_request *request)
        struct curl_slist *range_header = NULL;
        struct active_request_slot *slot;
 
-       snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
+       snprintf(prevfile, sizeof(prevfile), "%s.prev", obj_req->filename);
        unlink(prevfile);
-       rename(request->tmpfile, prevfile);
-       unlink(request->tmpfile);
+       rename(obj_req->tmpfile, prevfile);
+       unlink(obj_req->tmpfile);
 
-       request->local = open(request->tmpfile,
+       if (obj_req->local != -1)
+               error("fd leakage in start: %d", obj_req->local);
+       obj_req->local = open(obj_req->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 < 0 && errno == ENOENT) {
-               char *dir = strrchr(request->tmpfile, '/');
+       if (obj_req->local < 0 && errno == ENOENT) {
+               char *dir = strrchr(obj_req->tmpfile, '/');
                if (dir) {
                        *dir = 0;
-                       mkdir(request->tmpfile, 0777);
+                       mkdir(obj_req->tmpfile, 0777);
                        *dir = '/';
                }
-               request->local = open(request->tmpfile,
+               obj_req->local = open(obj_req->tmpfile,
                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
        }
 
-       if (request->local < 0) {
-               request->state = ABORTED;
-               error("Couldn't create temporary file %s for %s: %s\n",
-                     request->tmpfile, request->filename, strerror(errno));
+       if (obj_req->local < 0) {
+               obj_req->state = ABORTED;
+               error("Couldn't create temporary file %s for %s: %s",
+                     obj_req->tmpfile, obj_req->filename, strerror(errno));
                return;
        }
 
-       memset(&request->stream, 0, sizeof(request->stream));
+       memset(&obj_req->stream, 0, sizeof(obj_req->stream));
 
-       inflateInit(&request->stream);
+       inflateInit(&obj_req->stream);
 
-       SHA1_Init(&request->c);
+       SHA1_Init(&obj_req->c);
 
-       url = xmalloc(strlen(request->repo->base) + 50);
-       request->url = xmalloc(strlen(request->repo->base) + 50);
-       strcpy(url, request->repo->base);
-       posn = url + strlen(request->repo->base);
+       url = xmalloc(strlen(obj_req->repo->base) + 50);
+       obj_req->url = xmalloc(strlen(obj_req->repo->base) + 50);
+       strcpy(url, obj_req->repo->base);
+       posn = url + strlen(obj_req->repo->base);
        strcpy(posn, "objects/");
        posn += 8;
        memcpy(posn, hex, 2);
        posn += 2;
        *(posn++) = '/';
        strcpy(posn, hex + 2);
-       strcpy(request->url, url);
+       strcpy(obj_req->url, url);
 
        /* If a previous temp file is present, process what was already
           fetched. */
@@ -476,7 +218,7 @@ static void start_request(struct transfer_request *request)
                                if (fwrite_sha1_file(prev_buf,
                                                     1,
                                                     prev_read,
-                                                    request) == prev_read) {
+                                                    obj_req) == prev_read) {
                                        prev_posn += prev_read;
                                } else {
                                        prev_read = -1;
@@ -490,20 +232,24 @@ static void start_request(struct transfer_request *request)
        /* 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));
-               inflateInit(&request->stream);
-               SHA1_Init(&request->c);
+               memset(&obj_req->stream, 0, sizeof(obj_req->stream));
+               inflateInit(&obj_req->stream);
+               SHA1_Init(&obj_req->c);
                if (prev_posn>0) {
                        prev_posn = 0;
-                       lseek(request->local, SEEK_SET, 0);
-                       ftruncate(request->local, 0);
+                       lseek(obj_req->local, SEEK_SET, 0);
+                       ftruncate(obj_req->local, 0);
                }
        }
 
        slot = get_active_slot();
-       curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
+       slot->callback_func = process_object_response;
+       slot->callback_data = obj_req;
+       obj_req->slot = slot;
+
+       curl_easy_setopt(slot->curl, CURLOPT_FILE, obj_req);
        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_ERRORBUFFER, obj_req->errorstr);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
 
@@ -521,147 +267,111 @@ static void start_request(struct transfer_request *request)
        }
 
        /* Try to get the request started, abort the request on error */
+       obj_req->state = ACTIVE;
        if (!start_active_slot(slot)) {
-               request->state = ABORTED;
-               close(request->local);
-               free(request->url);
+               obj_req->state = ABORTED;
+               obj_req->slot = NULL;
+               close(obj_req->local); obj_req->local = -1;
+               free(obj_req->url);
                return;
        }
-       
-       request->slot = slot;
-       request->state = ACTIVE;
 }
 
-static void finish_request(struct transfer_request *request)
+static void finish_object_request(struct object_request *obj_req)
 {
        struct stat st;
 
-       fchmod(request->local, 0444);
-       close(request->local);
+       fchmod(obj_req->local, 0444);
+       close(obj_req->local); obj_req->local = -1;
 
-       if (request->http_code == 416) {
+       if (obj_req->http_code == 416) {
                fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
-       } else if (request->curl_result != CURLE_OK) {
-               if (stat(request->tmpfile, &st) == 0)
+       } else if (obj_req->curl_result != CURLE_OK) {
+               if (stat(obj_req->tmpfile, &st) == 0)
                        if (st.st_size == 0)
-                               unlink(request->tmpfile);
+                               unlink(obj_req->tmpfile);
                return;
        }
 
-       inflateEnd(&request->stream);
-       SHA1_Final(request->real_sha1, &request->c);
-       if (request->zret != Z_STREAM_END) {
-               unlink(request->tmpfile);
+       inflateEnd(&obj_req->stream);
+       SHA1_Final(obj_req->real_sha1, &obj_req->c);
+       if (obj_req->zret != Z_STREAM_END) {
+               unlink(obj_req->tmpfile);
                return;
        }
-       if (memcmp(request->sha1, request->real_sha1, 20)) {
-               unlink(request->tmpfile);
+       if (memcmp(obj_req->sha1, obj_req->real_sha1, 20)) {
+               unlink(obj_req->tmpfile);
                return;
        }
-       request->rename =
-               move_temp_to_file(request->tmpfile, request->filename);
+       obj_req->rename =
+               move_temp_to_file(obj_req->tmpfile, obj_req->filename);
 
-       if (request->rename == 0)
-               pull_say("got %s\n", sha1_to_hex(request->sha1));
+       if (obj_req->rename == 0)
+               pull_say("got %s\n", sha1_to_hex(obj_req->sha1));
 }
 
-static void release_request(struct transfer_request *request)
+static void process_object_response(void *callback_data)
 {
-       struct transfer_request *entry = request_queue_head;
+       struct object_request *obj_req =
+               (struct object_request *)callback_data;
 
-       if (request == request_queue_head) {
-               request_queue_head = request->next;
-       } else {
-               while (entry->next != NULL && entry->next != request)
-                       entry = entry->next;
-               if (entry->next == request)
-                       entry->next = entry->next->next;
+       obj_req->curl_result = obj_req->slot->curl_result;
+       obj_req->http_code = obj_req->slot->http_code;
+       obj_req->slot = NULL;
+       obj_req->state = COMPLETE;
+
+       /* Use alternates if necessary */
+       if (obj_req->http_code == 404 ||
+           obj_req->curl_result == CURLE_FILE_COULDNT_READ_FILE) {
+               fetch_alternates(alt->base);
+               if (obj_req->repo->next != NULL) {
+                       obj_req->repo =
+                               obj_req->repo->next;
+                       close(obj_req->local);
+                       obj_req->local = -1;
+                       start_object_request(obj_req);
+                       return;
+               }
        }
 
-       free(request->url);
-       free(request);
+       finish_object_request(obj_req);
 }
 
-#ifdef USE_CURL_MULTI
-static void process_curl_messages(void)
+static void release_object_request(struct object_request *obj_req)
 {
-       int num_messages;
-       struct active_request_slot *slot;
-       struct transfer_request *request = NULL;
-       CURLMsg *curl_message = curl_multi_info_read(curlm, &num_messages);
-
-       while (curl_message != NULL) {
-               if (curl_message->msg == CURLMSG_DONE) {
-                       int curl_result = curl_message->data.result;
-                       slot = active_queue_head;
-                       while (slot != NULL &&
-                              slot->curl != curl_message->easy_handle)
-                               slot = slot->next;
-                       if (slot != NULL) {
-                               curl_multi_remove_handle(curlm, slot->curl);
-                               active_requests--;
-                               slot->done = 1;
-                               slot->in_use = 0;
-                               slot->curl_result = curl_result;
-                               curl_easy_getinfo(slot->curl,
-                                                 CURLINFO_HTTP_CODE,
-                                                 &slot->http_code);
-                               request = request_queue_head;
-                               while (request != NULL &&
-                                      request->slot != slot)
-                                       request = request->next;
-                       } else {
-                               fprintf(stderr, "Received DONE message for unknown request!\n");
-                       }
-
-                       /* Process slot callback if appropriate */
-                       if (slot->callback_func != NULL) {
-                               slot->callback_func(slot->callback_data);
-                       }
+       struct object_request *entry = object_queue_head;
 
-                       if (request != NULL) {
-                               request->curl_result = curl_result;
-                               request->http_code = slot->http_code;
-                               request->slot = NULL;
-                               request->state = COMPLETE;
-
-                               /* Use alternates if necessary */
-                               if (request->http_code == 404) {
-                                       fetch_alternates(alt->base);
-                                       if (request->repo->next != NULL) {
-                                               request->repo =
-                                                       request->repo->next;
-                                               start_request(request);
-                                       } else {
-                                               finish_request(request);
-                                       }
-                               } else {
-                                       finish_request(request);
-                               }
-                       }
-               } else {
-                       fprintf(stderr, "Unknown CURL message received: %d\n",
-                               (int)curl_message->msg);
-               }
-               curl_message = curl_multi_info_read(curlm, &num_messages);
+       if (obj_req->local != -1)
+               error("fd leakage in release: %d", obj_req->local);
+       if (obj_req == object_queue_head) {
+               object_queue_head = obj_req->next;
+       } else {
+               while (entry->next != NULL && entry->next != obj_req)
+                       entry = entry->next;
+               if (entry->next == obj_req)
+                       entry->next = entry->next->next;
        }
+
+       free(obj_req->url);
+       free(obj_req);
 }
 
-static void process_request_queue(void)
+#ifdef USE_CURL_MULTI
+void fill_active_slots(void)
 {
-       struct transfer_request *request = request_queue_head;
+       struct object_request *obj_req = object_queue_head;
        struct active_request_slot *slot = active_queue_head;
        int num_transfers;
 
-       while (active_requests < max_requests && request != NULL) {
-               if (request->state == WAITING) {
-                       if (has_sha1_file(request->sha1))
-                               release_request(request);
+       while (active_requests < max_requests && obj_req != NULL) {
+               if (obj_req->state == WAITING) {
+                       if (has_sha1_file(obj_req->sha1))
+                               obj_req->state = COMPLETE;
                        else
-                               start_request(request);
+                               start_object_request(obj_req);
                        curl_multi_perform(curlm, &num_transfers);
                }
-               request = request->next;
+               obj_req = obj_req->next;
        }
 
        while (slot != NULL) {
@@ -670,14 +380,14 @@ static void process_request_queue(void)
                        slot->curl = NULL;
                }
                slot = slot->next;
-       }                               
+       }
 }
 #endif
 
 void prefetch(unsigned char *sha1)
 {
-       struct transfer_request *newreq;
-       struct transfer_request *tail;
+       struct object_request *newreq;
+       struct object_request *tail;
        char *filename = sha1_file_name(sha1);
 
        newreq = xmalloc(sizeof(*newreq));
@@ -691,18 +401,19 @@ void prefetch(unsigned char *sha1)
                 "%s.temp", filename);
        newreq->next = NULL;
 
-       if (request_queue_head == NULL) {
-               request_queue_head = newreq;
+       if (object_queue_head == NULL) {
+               object_queue_head = newreq;
        } else {
-               tail = request_queue_head;
+               tail = object_queue_head;
                while (tail->next != NULL) {
                        tail = tail->next;
                }
                tail->next = newreq;
        }
+
 #ifdef USE_CURL_MULTI
-       process_request_queue();
-       process_curl_messages();
+       fill_active_slots();
+       step_active_slots();
 #endif
 }
 
@@ -718,16 +429,17 @@ static int fetch_index(struct alt_base *repo, unsigned char *sha1)
 
        FILE *indexfile;
        struct active_request_slot *slot;
+       struct slot_results results;
 
        if (has_pack_index(sha1))
                return 0;
 
        if (get_verbosely)
                fprintf(stderr, "Getting index for pack %s\n", hex);
-       
+
        url = xmalloc(strlen(repo->base) + 64);
        sprintf(url, "%s/objects/pack/pack-%s.idx", repo->base, hex);
-       
+
        filename = sha1_pack_index_name(sha1);
        snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
        indexfile = fopen(tmpfile, "a");
@@ -736,6 +448,7 @@ static int fetch_index(struct alt_base *repo, unsigned char *sha1)
                             filename);
 
        slot = get_active_slot();
+       slot->results = &results;
        curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
@@ -757,12 +470,13 @@ static int fetch_index(struct alt_base *repo, unsigned char *sha1)
 
        if (start_active_slot(slot)) {
                run_active_slot(slot);
-               if (slot->curl_result != CURLE_OK) {
+               if (results.curl_result != CURLE_OK) {
                        fclose(indexfile);
                        return error("Unable to get pack index %s\n%s", url,
                                     curl_errorstr);
                }
        } else {
+               fclose(indexfile);
                return error("Unable to start request");
        }
 
@@ -786,9 +500,10 @@ static int setup_index(struct alt_base *repo, unsigned char *sha1)
        return 0;
 }
 
-static void process_alternates(void *callback_data)
+static void process_alternates_response(void *callback_data)
 {
-       struct alt_request *alt_req = (struct alt_request *)callback_data;
+       struct alternates_request *alt_req =
+               (struct alternates_request *)callback_data;
        struct active_request_slot *slot = alt_req->slot;
        struct alt_base *tail = alt;
        char *base = alt_req->base;
@@ -808,23 +523,25 @@ static void process_alternates(void *callback_data)
                                         alt_req->url);
                        active_requests++;
                        slot->in_use = 1;
-                       slot->done = 0;
-                       if (start_active_slot(slot)) {
-                               return;
-                       } else {
+                       if (slot->finished != NULL)
+                               (*slot->finished) = 0;
+                       if (!start_active_slot(slot)) {
                                got_alternates = -1;
-                               slot->done = 1;
-                               return;
+                               slot->in_use = 0;
+                               if (slot->finished != NULL)
+                                       (*slot->finished) = 1;
                        }
+                       return;
                }
        } else if (slot->curl_result != CURLE_OK) {
-               if (slot->http_code != 404) {
+               if (slot->http_code != 404 &&
+                   slot->curl_result != CURLE_FILE_COULDNT_READ_FILE) {
                        got_alternates = -1;
                        return;
                }
        }
 
-       fwrite_buffer_dynamic(&null_byte, 1, 1, alt_req->buffer);
+       fwrite_buffer(&null_byte, 1, 1, alt_req->buffer);
        alt_req->buffer->posn--;
        data = alt_req->buffer->buffer;
 
@@ -837,13 +554,14 @@ static void process_alternates(void *callback_data)
                        int serverlen = 0;
                        struct alt_base *newalt;
                        char *target = NULL;
+                       char *path;
                        if (data[i] == '/') {
                                serverlen = strchr(base + 8, '/') - base;
                                okay = 1;
                        } else if (!memcmp(data + i, "../", 3)) {
                                i += 3;
                                serverlen = strlen(base);
-                               while (i + 2 < posn && 
+                               while (i + 2 < posn &&
                                       !memcmp(data + i, "../", 3)) {
                                        do {
                                                serverlen--;
@@ -852,7 +570,7 @@ static void process_alternates(void *callback_data)
                                        i += 3;
                                }
                                // If the server got removed, give up.
-                               okay = strchr(base, ':') - base + 3 < 
+                               okay = strchr(base, ':') - base + 3 <
                                        serverlen;
                        } else if (alt_req->http_specific) {
                                char *colon = strchr(data + i, ':');
@@ -870,13 +588,20 @@ static void process_alternates(void *callback_data)
                                        posn - i - 7);
                                target[serverlen + posn - i - 7] = '\0';
                                if (get_verbosely)
-                                       fprintf(stderr, 
+                                       fprintf(stderr,
                                                "Also look at %s\n", target);
                                newalt = xmalloc(sizeof(*newalt));
                                newalt->next = NULL;
                                newalt->base = target;
                                newalt->got_indices = 0;
                                newalt->packs = NULL;
+                               path = strstr(target, "//");
+                               if (path) {
+                                       path = strchr(path+2, '/');
+                                       if (path)
+                                               newalt->path_len = strlen(path);
+                               }
+
                                while (tail->next != NULL)
                                        tail = tail->next;
                                tail->next = newalt;
@@ -894,17 +619,16 @@ static void fetch_alternates(char *base)
        char *url;
        char *data;
        struct active_request_slot *slot;
-       static struct alt_request alt_req;
-       int num_transfers;
+       struct alternates_request alt_req;
 
        /* If another request has already started fetching alternates,
           wait for them to arrive and return to processing this request's
           curl message */
+#ifdef USE_CURL_MULTI
        while (got_alternates == 0) {
-               curl_multi_perform(curlm, &num_transfers);
-               process_curl_messages();
-               process_request_queue();
+               step_active_slots();
        }
+#endif
 
        /* Nothing to do if they've already been fetched */
        if (got_alternates == 1)
@@ -920,19 +644,18 @@ static void fetch_alternates(char *base)
 
        if (get_verbosely)
                fprintf(stderr, "Getting alternates list for %s\n", base);
-       
+
        url = xmalloc(strlen(base) + 31);
        sprintf(url, "%s/objects/info/http-alternates", base);
 
        /* Use a callback to process the result, since another request
           may fail and need to have alternates loaded before continuing */
        slot = get_active_slot();
-       slot->callback_func = process_alternates;
+       slot->callback_func = process_alternates_response;
        slot->callback_data = &alt_req;
 
        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
-                        fwrite_buffer_dynamic);
+       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
 
        alt_req.base = base;
@@ -950,6 +673,209 @@ static void fetch_alternates(char *base)
        free(url);
 }
 
+#ifndef NO_EXPAT
+static void
+xml_start_tag(void *userData, const char *name, const char **atts)
+{
+       struct xml_ctx *ctx = (struct xml_ctx *)userData;
+       const char *c = strchr(name, ':');
+       int new_len;
+
+       if (c == NULL)
+               c = name;
+       else
+               c++;
+
+       new_len = strlen(ctx->name) + strlen(c) + 2;
+
+       if (new_len > ctx->len) {
+               ctx->name = xrealloc(ctx->name, new_len);
+               ctx->len = new_len;
+       }
+       strcat(ctx->name, ".");
+       strcat(ctx->name, c);
+
+       if (ctx->cdata) {
+               free(ctx->cdata);
+               ctx->cdata = NULL;
+       }
+
+       ctx->userFunc(ctx, 0);
+}
+
+static void
+xml_end_tag(void *userData, const char *name)
+{
+       struct xml_ctx *ctx = (struct xml_ctx *)userData;
+       const char *c = strchr(name, ':');
+       char *ep;
+
+       ctx->userFunc(ctx, 1);
+
+       if (c == NULL)
+               c = name;
+       else
+               c++;
+
+       ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
+       *ep = 0;
+}
+
+static void
+xml_cdata(void *userData, const XML_Char *s, int len)
+{
+       struct xml_ctx *ctx = (struct xml_ctx *)userData;
+       if (ctx->cdata)
+               free(ctx->cdata);
+       ctx->cdata = xcalloc(len+1, 1);
+       strncpy(ctx->cdata, s, len);
+}
+
+static int remote_ls(struct alt_base *repo, const char *path, int flags,
+                    void (*userFunc)(struct remote_ls_ctx *ls),
+                    void *userData);
+
+static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
+{
+       struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
+
+       if (tag_closed) {
+               if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
+                       if (ls->dentry_flags & IS_DIR) {
+                               if (ls->flags & PROCESS_DIRS) {
+                                       ls->userFunc(ls);
+                               }
+                               if (strcmp(ls->dentry_name, ls->path) &&
+                                   ls->flags & RECURSIVE) {
+                                       ls->rc = remote_ls(ls->repo,
+                                                          ls->dentry_name,
+                                                          ls->flags,
+                                                          ls->userFunc,
+                                                          ls->userData);
+                               }
+                       } else if (ls->flags & PROCESS_FILES) {
+                               ls->userFunc(ls);
+                       }
+               } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
+                       ls->dentry_name = xmalloc(strlen(ctx->cdata) -
+                                                 ls->repo->path_len + 1);
+                       strcpy(ls->dentry_name, ctx->cdata + ls->repo->path_len);
+               } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
+                       ls->dentry_flags |= IS_DIR;
+               }
+       } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
+               if (ls->dentry_name) {
+                       free(ls->dentry_name);
+               }
+               ls->dentry_name = NULL;
+               ls->dentry_flags = 0;
+       }
+}
+
+static int remote_ls(struct alt_base *repo, const char *path, int flags,
+                    void (*userFunc)(struct remote_ls_ctx *ls),
+                    void *userData)
+{
+       char *url = xmalloc(strlen(repo->base) + strlen(path) + 1);
+       struct active_request_slot *slot;
+       struct slot_results results;
+       struct buffer in_buffer;
+       struct buffer out_buffer;
+       char *in_data;
+       char *out_data;
+       XML_Parser parser = XML_ParserCreate(NULL);
+       enum XML_Status result;
+       struct curl_slist *dav_headers = NULL;
+       struct xml_ctx ctx;
+       struct remote_ls_ctx ls;
+
+       ls.flags = flags;
+       ls.repo = repo;
+       ls.path = strdup(path);
+       ls.dentry_name = NULL;
+       ls.dentry_flags = 0;
+       ls.userData = userData;
+       ls.userFunc = userFunc;
+       ls.rc = 0;
+
+       sprintf(url, "%s%s", repo->base, path);
+
+       out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
+       out_data = xmalloc(out_buffer.size + 1);
+       snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
+       out_buffer.posn = 0;
+       out_buffer.buffer = out_data;
+
+       in_buffer.size = 4096;
+       in_data = xmalloc(in_buffer.size);
+       in_buffer.posn = 0;
+       in_buffer.buffer = in_data;
+
+       dav_headers = curl_slist_append(dav_headers, "Depth: 1");
+       dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
+
+       slot = get_active_slot();
+       slot->results = &results;
+       curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
+       curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
+       curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
+       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);
+       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);
+
+       if (start_active_slot(slot)) {
+               run_active_slot(slot);
+               if (results.curl_result == CURLE_OK) {
+                       ctx.name = xcalloc(10, 1);
+                       ctx.len = 0;
+                       ctx.cdata = NULL;
+                       ctx.userFunc = handle_remote_ls_ctx;
+                       ctx.userData = &ls;
+                       XML_SetUserData(parser, &ctx);
+                       XML_SetElementHandler(parser, xml_start_tag,
+                                             xml_end_tag);
+                       XML_SetCharacterDataHandler(parser, xml_cdata);
+                       result = XML_Parse(parser, in_buffer.buffer,
+                                          in_buffer.posn, 1);
+                       free(ctx.name);
+
+                       if (result != XML_STATUS_OK) {
+                               ls.rc = error("XML error: %s",
+                                             XML_ErrorString(
+                                                     XML_GetErrorCode(parser)));
+                       }
+               } else {
+                       ls.rc = -1;
+               }
+       } else {
+               ls.rc = error("Unable to start PROPFIND request");
+       }
+
+       free(ls.path);
+       free(url);
+       free(out_data);
+       free(in_buffer.buffer);
+       curl_slist_free_all(dav_headers);
+
+       return ls.rc;
+}
+
+static void process_ls_pack(struct remote_ls_ctx *ls)
+{
+       unsigned char sha1[20];
+
+       if (strlen(ls->dentry_name) == 63 &&
+           !strncmp(ls->dentry_name, "objects/pack/pack-", 18) &&
+           !strncmp(ls->dentry_name+58, ".pack", 5)) {
+               get_sha1_hex(ls->dentry_name + 18, sha1);
+               setup_index(ls->repo, sha1);
+       }
+}
+#endif
+
 static int fetch_indices(struct alt_base *repo)
 {
        unsigned char sha1[20];
@@ -959,6 +885,7 @@ static int fetch_indices(struct alt_base *repo)
        int i = 0;
 
        struct active_request_slot *slot;
+       struct slot_results results;
 
        if (repo->got_indices)
                return 0;
@@ -970,23 +897,38 @@ static int fetch_indices(struct alt_base *repo)
 
        if (get_verbosely)
                fprintf(stderr, "Getting pack list for %s\n", repo->base);
-       
+
+#ifndef NO_EXPAT
+       if (remote_ls(repo, "objects/pack/", PROCESS_FILES,
+                     process_ls_pack, NULL) == 0)
+               return 0;
+#endif
+
        url = xmalloc(strlen(repo->base) + 21);
        sprintf(url, "%s/objects/info/packs", repo->base);
 
        slot = get_active_slot();
+       slot->results = &results;
        curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
-       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION,
-                        fwrite_buffer_dynamic);
+       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 (slot->curl_result != CURLE_OK) {
-                       free(buffer.buffer);
-                       return error("%s", curl_errorstr);
+               if (results.curl_result != CURLE_OK) {
+                       if (results.http_code == 404 ||
+                           results.curl_result == CURLE_FILE_COULDNT_READ_FILE) {
+                               repo->got_indices = 1;
+                               free(buffer.buffer);
+                               return 0;
+                       } else {
+                               repo->got_indices = 0;
+                               free(buffer.buffer);
+                               return error("%s", curl_errorstr);
+                       }
                }
        } else {
+               repo->got_indices = 0;
                free(buffer.buffer);
                return error("Unable to start request");
        }
@@ -996,7 +938,7 @@ static int fetch_indices(struct alt_base *repo)
                switch (data[i]) {
                case 'P':
                        i++;
-                       if (i + 52 < buffer.posn &&
+                       if (i + 52 <= buffer.posn &&
                            !strncmp(data + i, " pack-", 6) &&
                            !strncmp(data + i + 46, ".pack\n", 6)) {
                                get_sha1_hex(data + i + 6, sha1);
@@ -1005,7 +947,7 @@ static int fetch_indices(struct alt_base *repo)
                                break;
                        }
                default:
-                       while (data[i] != '\n')
+                       while (i < buffer.posn && data[i] != '\n')
                                i++;
                }
                i++;
@@ -1030,6 +972,7 @@ static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
        struct curl_slist *range_header = NULL;
 
        struct active_request_slot *slot;
+       struct slot_results results;
 
        if (fetch_indices(repo))
                return -1;
@@ -1056,6 +999,7 @@ static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
                             filename);
 
        slot = get_active_slot();
+       slot->results = &results;
        curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
        curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
@@ -1077,12 +1021,13 @@ static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
 
        if (start_active_slot(slot)) {
                run_active_slot(slot);
-               if (slot->curl_result != CURLE_OK) {
+               if (results.curl_result != CURLE_OK) {
                        fclose(packfile);
                        return error("Unable to get pack file %s\n%s", url,
                                     curl_errorstr);
                }
        } else {
+               fclose(packfile);
                return error("Unable to start request");
        }
 
@@ -1104,93 +1049,74 @@ static int fetch_pack(struct alt_base *repo, unsigned char *sha1)
        return 0;
 }
 
+static void abort_object_request(struct object_request *obj_req)
+{
+       if (obj_req->local >= 0) {
+               close(obj_req->local);
+               obj_req->local = -1;
+       }
+       unlink(obj_req->tmpfile);
+       if (obj_req->slot) {
+               release_active_slot(obj_req->slot);
+               obj_req->slot = NULL;
+       }
+       release_object_request(obj_req);
+}
+
 static int fetch_object(struct alt_base *repo, unsigned char *sha1)
 {
        char *hex = sha1_to_hex(sha1);
-       int ret;
-       struct transfer_request *request = request_queue_head;
+       int ret = 0;
+       struct object_request *obj_req = object_queue_head;
 
-       while (request != NULL && memcmp(request->sha1, sha1, 20))
-               request = request->next;
-       if (request == NULL)
+       while (obj_req != NULL && memcmp(obj_req->sha1, sha1, 20))
+               obj_req = obj_req->next;
+       if (obj_req == NULL)
                return error("Couldn't find request for %s in the queue", hex);
 
-       if (has_sha1_file(request->sha1)) {
-               release_request(request);
+       if (has_sha1_file(obj_req->sha1)) {
+               abort_object_request(obj_req);
                return 0;
        }
 
 #ifdef USE_CURL_MULTI
-       while (request->state == WAITING) {
-               int num_transfers;
-               curl_multi_perform(curlm, &num_transfers);
-               if (num_transfers < active_requests) {
-                       process_curl_messages();
-                       process_request_queue();
-               }
+       while (obj_req->state == WAITING) {
+               step_active_slots();
        }
 #else
-       start_request(request);
+       start_object_request(obj_req);
 #endif
 
-       while (request->state == ACTIVE) {
-               run_active_slot(request->slot);
-#ifndef USE_CURL_MULTI
-               request->curl_result = request->slot->curl_result;
-               request->http_code = request->slot->http_code;
-               request->slot = NULL;
-
-               /* Use alternates if necessary */
-               if (request->http_code == 404) {
-                       fetch_alternates(alt->base);
-                       if (request->repo->next != NULL) {
-                               request->repo = request->repo->next;
-                               start_request(request);
-                       }
-               } else {
-                       finish_request(request);
-                       request->state = COMPLETE;
-               }
-#endif
+       while (obj_req->state == ACTIVE) {
+               run_active_slot(obj_req->slot);
        }
-
-       if (request->state == ABORTED) {
-               release_request(request);
-               return error("Request for %s aborted", hex);
+       if (obj_req->local != -1) {
+               close(obj_req->local); obj_req->local = -1;
        }
 
-       if (request->curl_result != CURLE_OK && request->http_code != 416) {
-               if (request->http_code == 404)
+       if (obj_req->state == ABORTED) {
+               ret = error("Request for %s aborted", hex);
+       } else if (obj_req->curl_result != CURLE_OK &&
+                  obj_req->http_code != 416) {
+               if (obj_req->http_code == 404 ||
+                   obj_req->curl_result == CURLE_FILE_COULDNT_READ_FILE)
                        ret = -1; /* Be silent, it is probably in a pack. */
                else
                        ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
-                                   request->errorstr, request->curl_result,
-                                   request->http_code, hex);
-               release_request(request);
-               return ret;
-       }
-
-       if (request->zret != Z_STREAM_END) {
-               ret = error("File %s (%s) corrupt\n", hex, request->url);
-               release_request(request);
-               return ret;
-       }
-
-       if (memcmp(request->sha1, request->real_sha1, 20)) {
-               release_request(request);
-               return error("File %s has bad hash\n", hex);
-       }
-
-       if (request->rename < 0) {
-               ret = error("unable to write sha1 filename %s: %s",
-                           request->filename,
-                           strerror(request->rename));
-               release_request(request);
-               return ret;
+                                   obj_req->errorstr, obj_req->curl_result,
+                                   obj_req->http_code, hex);
+       } else if (obj_req->zret != Z_STREAM_END) {
+               corrupt_object_found++;
+               ret = error("File %s (%s) corrupt", hex, obj_req->url);
+       } else if (memcmp(obj_req->sha1, obj_req->real_sha1, 20)) {
+               ret = error("File %s has bad hash", hex);
+       } else if (obj_req->rename < 0) {
+               ret = error("unable to write sha1 filename %s",
+                           obj_req->filename);
        }
 
-       release_request(request);
-       return 0;
+       release_object_request(obj_req);
+       return ret;
 }
 
 int fetch(unsigned char *sha1)
@@ -1205,7 +1131,7 @@ int fetch(unsigned char *sha1)
                fetch_alternates(alt->base);
                altbase = altbase->next;
        }
-       return error("Unable to find %s under %s\n", sha1_to_hex(sha1), 
+       return error("Unable to find %s under %s", sha1_to_hex(sha1),
                     alt->base);
 }
 
@@ -1261,20 +1187,22 @@ int fetch_ref(char *ref, unsigned char *sha1)
         struct buffer buffer;
        char *base = alt->base;
        struct active_request_slot *slot;
+       struct slot_results results;
         buffer.size = 41;
         buffer.posn = 0;
         buffer.buffer = hex;
         hex[41] = '\0';
-        
+
        url = quote_ref_url(base, ref);
        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 (slot->curl_result != CURLE_OK)
+               if (results.curl_result != CURLE_OK)
                        return error("Couldn't get %s for %s\n%s",
                                     url, ref, curl_errorstr);
        } else {
@@ -1290,13 +1218,12 @@ int main(int argc, char **argv)
 {
        char *commit_id;
        char *url;
+       char *path;
        int arg = 1;
-       struct active_request_slot *slot;
-       char *low_speed_limit;
-       char *low_speed_time;
-       char *wait_url;
        int rc = 0;
 
+       setup_git_directory();
+
        while (arg < argc && argv[arg][0] == '-') {
                if (argv[arg][1] == 't') {
                        get_tree = 1;
@@ -1323,92 +1250,34 @@ int main(int argc, char **argv)
        commit_id = argv[arg];
        url = argv[arg + 1];
 
-       curl_global_init(CURL_GLOBAL_ALL);
-
-#ifdef USE_CURL_MULTI
-       {
-               char *http_max_requests = getenv("GIT_HTTP_MAX_REQUESTS");
-               if (http_max_requests != NULL)
-                       max_requests = atoi(http_max_requests);
-       }
-
-       curlm = curl_multi_init();
-       if (curlm == NULL) {
-               fprintf(stderr, "Error creating curl multi handle.\n");
-               return 1;
-       }
-#endif
-
-       if (getenv("GIT_SSL_NO_VERIFY"))
-               curl_ssl_verify = 0;
-
-       ssl_cert = getenv("GIT_SSL_CERT");
-#if LIBCURL_VERSION_NUM >= 0x070902
-       ssl_key = getenv("GIT_SSL_KEY");
-#endif
-#if LIBCURL_VERSION_NUM >= 0x070908
-       ssl_capath = getenv("GIT_SSL_CAPATH");
-#endif
-       ssl_cainfo = getenv("GIT_SSL_CAINFO");
-
-       low_speed_limit = getenv("GIT_HTTP_LOW_SPEED_LIMIT");
-       if (low_speed_limit != NULL)
-               curl_low_speed_limit = strtol(low_speed_limit, NULL, 10);
-       low_speed_time = getenv("GIT_HTTP_LOW_SPEED_TIME");
-       if (low_speed_time != NULL)
-               curl_low_speed_time = strtol(low_speed_time, NULL, 10);
-
-       git_config(http_options);
+       http_init();
 
-       if (curl_ssl_verify == -1)
-               curl_ssl_verify = 1;
-
-#ifdef USE_CURL_MULTI
-       if (max_requests < 1)
-               max_requests = DEFAULT_MAX_REQUESTS;
-#endif
-
-       pragma_header = curl_slist_append(pragma_header, "Pragma: no-cache");
        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
-       no_range_header = curl_slist_append(no_range_header, "Range:");
-
-#ifndef NO_CURL_EASY_DUPHANDLE
-       curl_default = get_curl_handle();
-#endif
 
        alt = xmalloc(sizeof(*alt));
        alt->base = url;
        alt->got_indices = 0;
        alt->packs = NULL;
        alt->next = NULL;
+       path = strstr(url, "//");
+       if (path) {
+               path = strchr(path+2, '/');
+               if (path)
+                       alt->path_len = strlen(path);
+       }
 
        if (pull(commit_id))
                rc = 1;
 
-       curl_slist_free_all(pragma_header);
        curl_slist_free_all(no_pragma_header);
-       curl_slist_free_all(no_range_header);
-#ifndef NO_CURL_EASY_DUPHANDLE
-       curl_easy_cleanup(curl_default);
-#endif
-       slot = active_queue_head;
-       while (slot != NULL) {
-               if (slot->in_use) {
-                       if (get_verbosely) {
-                               curl_easy_getinfo(slot->curl,
-                                                 CURLINFO_EFFECTIVE_URL,
-                                                 &wait_url);
-                               fprintf(stderr, "Waiting for %s\n", wait_url);
-                       }
-                       run_active_slot(slot);
-               }
-               if (slot->curl != NULL)
-                       curl_easy_cleanup(slot->curl);
-               slot = slot->next;
+
+       http_cleanup();
+
+       if (corrupt_object_found) {
+               fprintf(stderr,
+"Some loose object were found to be corrupt, but they might be just\n"
+"a false '404 Not Found' error message sent with incorrect HTTP\n"
+"status code.  Suggest running git fsck-objects.\n");
        }
-#ifdef USE_CURL_MULTI
-       curl_multi_cleanup(curlm);
-#endif
-       curl_global_cleanup();
        return rc;
 }