Fix sparse warnings
[gitweb.git] / http-push.c
index 0b90fb9ae3396d0f2b0a9ebf9acad8374f3db317..76c788673e0a02c723d99976d3e605531341c7a9 100644 (file)
@@ -4,30 +4,13 @@
 #include "fetch.h"
 #include "tag.h"
 #include "blob.h"
+#include "http.h"
 
-#include <curl/curl.h>
-#include <curl/easy.h>
 #include <expat.h>
 
 static const char http_push_usage[] =
 "git-http-push [--complete] [--force] [--verbose] <url> <ref> [<ref>...]\n";
 
-#if LIBCURL_VERSION_NUM >= 0x070908
-#define USE_CURL_MULTI
-#define DEFAULT_MAX_REQUESTS 5
-#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
-
-#if LIBCURL_VERSION_NUM < 0x070c04
-#define NO_CURL_EASY_DUPHANDLE
-#endif
-
 #ifndef XML_STATUS_OK
 enum XML_Status {
   XML_STATUS_OK = 1,
@@ -39,47 +22,45 @@ enum XML_Status {
 
 #define RANGE_HEADER_SIZE 30
 
-/* DAV method names and request body templates */
+/* DAV methods */
 #define DAV_LOCK "LOCK"
 #define DAV_MKCOL "MKCOL"
 #define DAV_MOVE "MOVE"
 #define DAV_PROPFIND "PROPFIND"
 #define DAV_PUT "PUT"
 #define DAV_UNLOCK "UNLOCK"
+
+/* DAV lock flags */
+#define DAV_PROP_LOCKWR (1u << 0)
+#define DAV_PROP_LOCKEX (1u << 1)
+#define DAV_LOCK_OK (1u << 2)
+
+/* DAV XML properties */
+#define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
+#define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
+#define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
+#define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
+#define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
+#define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
+
+/* DAV request body templates */
 #define PROPFIND_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
 
 #define LOCK_TIME 600
 #define LOCK_REFRESH 30
 
-static int active_requests = 0;
-static int data_received;
 static int pushing = 0;
 static int aborted = 0;
 static char remote_dir_exists[256];
 
-#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 *no_pragma_header;
 static struct curl_slist *default_headers;
-static char curl_errorstr[CURL_ERROR_SIZE];
 
 static int push_verbosely = 0;
 static int push_all = 0;
 static int force_all = 0;
 
-struct buffer
-{
-        size_t posn;
-        size_t size;
-        void *buffer;
-};
-
 struct repo
 {
        char *url;
@@ -122,40 +103,19 @@ struct transfer_request
        struct transfer_request *next;
 };
 
-struct active_request_slot
-{
-       CURL *curl;
-       FILE *local;
-       int in_use;
-       int done;
-       CURLcode curl_result;
-       long http_code;
-       struct active_request_slot *next;
-};
-
 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 xml_ctx
+{
+       char *name;
+       int len;
+       char *cdata;
+       void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
+       void *userData;
+};
 
 struct active_lock
 {
-       int ctx_activelock;
-       int ctx_owner;
-       int ctx_owner_href;
-       int ctx_timeout;
-       int ctx_locktoken;
-       int ctx_locktoken_href;
        char *url;
        char *owner;
        char *token;
@@ -164,270 +124,14 @@ struct active_lock
        int refreshing;
 };
 
-struct lockprop
-{
-       int supported_lock;
-       int lock_entry;
-       int lock_scope;
-       int lock_type;
-       int lock_exclusive;
-       int lock_exclusive_write;
-};
+static void finish_request(struct transfer_request *request);
 
-static int http_options(const char *var, const char *value)
+static void process_response(void *callback_data)
 {
-       if (!strcmp("http.sslverify", var)) {
-               if (curl_ssl_verify == -1) {
-                       curl_ssl_verify = git_config_bool(var, value);
-               }
-               return 0;
-       }
+       struct transfer_request *request =
+               (struct transfer_request *)callback_data;
 
-       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;
-       }
-#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 fread_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(ptr, buffer->buffer + buffer->posn, size);
-       buffer->posn += size;
-       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 size_t fwrite_null(const void *ptr, size_t eltsize,
-                         size_t nmemb, struct buffer *buffer)
-{
-       data_received++;
-       return eltsize * nmemb;
-}
-
-#ifdef USE_CURL_MULTI
-static void process_curl_messages(void);
-static void process_request_queue(void);
-#endif
-
-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);
-       }
-
-       return result;
-}
-
-static struct active_request_slot *get_active_slot(void)
-{
-       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;
-       curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, default_headers);
-       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
+       finish_request(request);
 }
 
 static void start_check(struct transfer_request *request)
@@ -447,6 +151,8 @@ static void start_check(struct transfer_request *request)
        strcpy(posn, hex + 2);
 
        slot = get_active_slot();
+       slot->callback_func = process_response;
+       slot->callback_data = request;
        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
        curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
        curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
@@ -457,6 +163,7 @@ static void start_check(struct transfer_request *request)
        } else {
                request->state = ABORTED;
                free(request->url);
+               request->url = NULL;
        }
 }
 
@@ -476,6 +183,8 @@ static void start_mkcol(struct transfer_request *request)
        strcpy(posn, "/");
 
        slot = get_active_slot();
+       slot->callback_func = process_response;
+       slot->callback_data = request;
        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
        curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
        curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
@@ -488,6 +197,7 @@ static void start_mkcol(struct transfer_request *request)
        } else {
                request->state = ABORTED;
                free(request->url);
+               request->url = NULL;
        }
 }
 
@@ -534,8 +244,6 @@ static void start_put(struct transfer_request *request)
        request->buffer.size = stream.total_out;
        request->buffer.posn = 0;
 
-       if (request->url != NULL)
-               free(request->url);
        request->url = xmalloc(strlen(remote->url) + 
                               strlen(request->lock->token) + 51);
        strcpy(request->url, remote->url);
@@ -553,6 +261,8 @@ static void start_put(struct transfer_request *request)
        strcpy(posn, request->lock->token);
 
        slot = get_active_slot();
+       slot->callback_func = process_response;
+       slot->callback_data = request;
        curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
        curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
        curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
@@ -569,6 +279,7 @@ static void start_put(struct transfer_request *request)
        } else {
                request->state = ABORTED;
                free(request->url);
+               request->url = NULL;
        }
 }
 
@@ -578,6 +289,8 @@ static void start_move(struct transfer_request *request)
        struct curl_slist *dav_headers = NULL;
 
        slot = get_active_slot();
+       slot->callback_func = process_response;
+       slot->callback_data = request;
        curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
        dav_headers = curl_slist_append(dav_headers, request->dest);
@@ -592,10 +305,11 @@ static void start_move(struct transfer_request *request)
        } else {
                request->state = ABORTED;
                free(request->url);
+               request->url = NULL;
        }
 }
 
-int refresh_lock(struct active_lock *lock)
+static int refresh_lock(struct active_lock *lock)
 {
        struct active_request_slot *slot;
        char *if_header;
@@ -656,6 +370,13 @@ static void finish_request(struct transfer_request *request)
 
        if (request->headers != NULL)
                curl_slist_free_all(request->headers);
+
+       /* URL is reused for MOVE after PUT */
+       if (request->state != RUN_PUT) {
+               free(request->url);
+               request->url = NULL;
+       }               
+
        if (request->state == RUN_HEAD) {
                if (request->http_code == 404) {
                        request->state = NEED_PUSH;
@@ -721,52 +442,12 @@ static void release_request(struct transfer_request *request)
                        entry->next = entry->next->next;
        }
 
-       free(request->url);
+       if (request->url != NULL)
+               free(request->url);
        free(request);
 }
 
-#ifdef USE_CURL_MULTI
-void process_curl_messages(void)
-{
-       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) {
-                       slot = active_queue_head;
-                       while (slot != NULL &&
-                              slot->curl != curl_message->easy_handle)
-                               slot = slot->next;
-                       if (slot != NULL) {
-                               int curl_result = curl_message->data.result;
-                               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;
-                               if (request != NULL)
-                                       finish_request(request);
-                       } else {
-                               fprintf(stderr, "Received DONE message for unknown request!\n");
-                       }
-               } else {
-                       fprintf(stderr, "Unknown CURL message received: %d\n",
-                               (int)curl_message->msg);
-               }
-               curl_message = curl_multi_info_read(curlm, &num_messages);
-       }
-}
-
-void process_request_queue(void)
+void fill_active_slots(void)
 {
        struct transfer_request *request = request_queue_head;
        struct active_request_slot *slot = active_queue_head;
@@ -797,22 +478,8 @@ void process_request_queue(void)
                slot = slot->next;
        }                               
 }
-#endif
-
-void process_waiting_requests(void)
-{
-       struct active_request_slot *slot = active_queue_head;
-
-       while (slot != NULL)
-               if (slot->in_use) {
-                       run_active_slot(slot);
-                       slot = active_queue_head;
-               } else {
-                       slot = slot->next;
-               }
-}
 
-void add_request(unsigned char *sha1, struct active_lock *lock)
+static void add_request(unsigned char *sha1, struct active_lock *lock)
 {
        struct transfer_request *request = request_queue_head;
        struct packed_git *target;
@@ -834,10 +501,9 @@ void add_request(unsigned char *sha1, struct active_lock *lock)
        request->state = NEED_CHECK;
        request->next = request_queue_head;
        request_queue_head = request;
-#ifdef USE_CURL_MULTI
-       process_request_queue();
-       process_curl_messages();
-#endif
+
+       fill_active_slots();
+       step_active_slots();
 }
 
 static int fetch_index(unsigned char *sha1)
@@ -917,6 +583,7 @@ static int fetch_index(unsigned char *sha1)
                }
        } else {
                free(url);
+               fclose(indexfile);
                return error("Unable to start request");
        }
 
@@ -939,7 +606,7 @@ static int setup_index(unsigned char *sha1)
        return 0;
 }
 
-static int fetch_indices()
+static int fetch_indices(void)
 {
        unsigned char sha1[20];
        char *url;
@@ -963,8 +630,7 @@ static int fetch_indices()
 
        slot = get_active_slot();
        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)) {
@@ -1068,8 +734,7 @@ int fetch_ref(char *ref, unsigned char *sha1)
        url = quote_ref_url(base, ref);
        slot = get_active_slot();
        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_HTTPHEADER, NULL);
        curl_easy_setopt(slot->curl, CURLOPT_URL, url);
        if (start_active_slot(slot)) {
@@ -1086,110 +751,104 @@ int fetch_ref(char *ref, unsigned char *sha1)
         return 0;
 }
 
-static void
-start_activelock_element(void *userData, const char *name, const char **atts)
+static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
 {
-       struct active_lock *lock = (struct active_lock *)userData;
-
-       if (lock->ctx_activelock && !strcmp(name, "D:timeout"))
-               lock->ctx_timeout = 1;
-       else if (lock->ctx_owner && strstr(name, "href"))
-               lock->ctx_owner_href = 1;
-       else if (lock->ctx_activelock && strstr(name, "owner"))
-               lock->ctx_owner = 1;
-       else if (lock->ctx_locktoken && !strcmp(name, "D:href"))
-               lock->ctx_locktoken_href = 1;
-       else if (lock->ctx_activelock && !strcmp(name, "D:locktoken"))
-               lock->ctx_locktoken = 1;
-       else if (!strcmp(name, "D:activelock"))
-               lock->ctx_activelock = 1;
+       int *lock_flags = (int *)ctx->userData;
+
+       if (tag_closed) {
+               if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
+                       if ((*lock_flags & DAV_PROP_LOCKEX) &&
+                           (*lock_flags & DAV_PROP_LOCKWR)) {
+                               *lock_flags |= DAV_LOCK_OK;
+                       }
+                       *lock_flags &= DAV_LOCK_OK;
+               } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
+                       *lock_flags |= DAV_PROP_LOCKWR;
+               } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
+                       *lock_flags |= DAV_PROP_LOCKEX;
+               }
+       }
 }
 
-static void
-end_activelock_element(void *userData, const char *name)
+static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
 {
-       struct active_lock *lock = (struct active_lock *)userData;
-
-       if (lock->ctx_timeout && !strcmp(name, "D:timeout")) {
-               lock->ctx_timeout = 0;
-       } else if (lock->ctx_owner_href && strstr(name, "href")) {
-               lock->ctx_owner_href = 0;
-       } else if (lock->ctx_owner && strstr(name, "owner")) {
-               lock->ctx_owner = 0;
-       } else if (lock->ctx_locktoken_href && !strcmp(name, "D:href")) {
-               lock->ctx_locktoken_href = 0;
-       } else if (lock->ctx_locktoken && !strcmp(name, "D:locktoken")) {
-               lock->ctx_locktoken = 0;
-       } else if (lock->ctx_activelock && !strcmp(name, "D:activelock")) {
-               lock->ctx_activelock = 0;
+       struct active_lock *lock = (struct active_lock *)ctx->userData;
+
+       if (tag_closed && ctx->cdata) {
+               if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
+                       lock->owner = xmalloc(strlen(ctx->cdata) + 1);
+                       strcpy(lock->owner, ctx->cdata);
+               } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
+                       if (!strncmp(ctx->cdata, "Second-", 7))
+                               lock->timeout =
+                                       strtol(ctx->cdata + 7, NULL, 10);
+               } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
+                       if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
+                               lock->token = xmalloc(strlen(ctx->cdata - 15));
+                               strcpy(lock->token, ctx->cdata + 16);
+                       }
+               }
        }
 }
 
 static void
-activelock_cdata(void *userData, const XML_Char *s, int len)
+xml_start_tag(void *userData, const char *name, const char **atts)
 {
-       struct active_lock *lock = (struct active_lock *)userData;
-       char *this = malloc(len+1);
-       strncpy(this, s, len);
-
-       if (lock->ctx_owner_href) {
-               lock->owner = malloc(len+1);
-               strcpy(lock->owner, this);
-       } else if (lock->ctx_locktoken_href) {
-               if (!strncmp(this, "opaquelocktoken:", 16)) {
-                       lock->token = malloc(len-15);
-                       strcpy(lock->token, this+16);
-               }
-       } else if (lock->ctx_timeout) {
-               if (!strncmp(this, "Second-", 7))
-                       lock->timeout = strtol(this+7, NULL, 10);
+       struct xml_ctx *ctx = (struct xml_ctx *)userData;
+       const char *c = index(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;
        }
 
-       free(this);
+       ctx->userFunc(ctx, 0);
 }
 
 static void
-start_lockprop_element(void *userData, const char *name, const char **atts)
+xml_end_tag(void *userData, const char *name)
 {
-       struct lockprop *prop = (struct lockprop *)userData;
+       struct xml_ctx *ctx = (struct xml_ctx *)userData;
+       const char *c = index(name, ':');
+       char *ep;
 
-       if (prop->lock_type && !strcmp(name, "D:write")) {
-               if (prop->lock_exclusive) {
-                       prop->lock_exclusive_write = 1;
-               }
-       } else if (prop->lock_scope && !strcmp(name, "D:exclusive")) {
-               prop->lock_exclusive = 1;
-       } else if (prop->lock_entry) {
-               if (!strcmp(name, "D:lockscope")) {
-                       prop->lock_scope = 1;
-               } else if (!strcmp(name, "D:locktype")) {
-                       prop->lock_type = 1;
-               }
-       } else if (prop->supported_lock) {
-               if (!strcmp(name, "D:lockentry")) {
-                       prop->lock_entry = 1;
-               }
-       } else if (!strcmp(name, "D:supportedlock")) {
-               prop->supported_lock = 1;
-       }
+       ctx->userFunc(ctx, 1);
+
+       if (c == NULL)
+               c = name;
+       else
+               c++;
+
+       ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
+       *ep = 0;
 }
 
 static void
-end_lockprop_element(void *userData, const char *name)
+xml_cdata(void *userData, const XML_Char *s, int len)
 {
-       struct lockprop *prop = (struct lockprop *)userData;
-
-       if (!strcmp(name, "D:lockentry")) {
-               prop->lock_entry = 0;
-               prop->lock_scope = 0;
-               prop->lock_type = 0;
-               prop->lock_exclusive = 0;
-       } else if (!strcmp(name, "D:supportedlock")) {
-               prop->supported_lock = 0;
-       }
+       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);
 }
 
-struct active_lock *lock_remote(char *file, long timeout)
+static struct active_lock *lock_remote(char *file, long timeout)
 {
        struct active_request_slot *slot;
        struct buffer out_buffer;
@@ -1199,10 +858,11 @@ struct active_lock *lock_remote(char *file, long timeout)
        char *url;
        char *ep;
        char timeout_header[25];
-       struct active_lock *new_lock;
+       struct active_lock *new_lock = NULL;
        XML_Parser parser = XML_ParserCreate(NULL);
        enum XML_Status result;
        struct curl_slist *dav_headers = NULL;
+       struct xml_ctx ctx;
 
        url = xmalloc(strlen(remote->url) + strlen(file) + 1);
        sprintf(url, "%s%s", remote->url, file);
@@ -1246,12 +906,6 @@ struct active_lock *lock_remote(char *file, long timeout)
        in_buffer.posn = 0;
        in_buffer.buffer = in_data;
 
-       new_lock = xcalloc(1, sizeof(*new_lock));
-       new_lock->owner = NULL;
-       new_lock->token = NULL;
-       new_lock->timeout = -1;
-       new_lock->refreshing = 0;
-
        sprintf(timeout_header, "Timeout: Second-%ld", timeout);
        dav_headers = curl_slist_append(dav_headers, timeout_header);
        dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
@@ -1261,47 +915,47 @@ struct active_lock *lock_remote(char *file, long timeout)
        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_dynamic);
+       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_LOCK);
        curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 
+       new_lock = xcalloc(1, sizeof(*new_lock));
+       new_lock->owner = NULL;
+       new_lock->token = NULL;
+       new_lock->timeout = -1;
+       new_lock->refreshing = 0;
+
        if (start_active_slot(slot)) {
                run_active_slot(slot);
-               if (slot->curl_result != CURLE_OK) {
-                       fprintf(stderr, "Got HTTP error %ld\n", slot->http_code);
-                       free(new_lock);
-                       free(url);
-                       free(out_data);
-                       free(in_data);
-                       return NULL;
+               if (slot->curl_result == CURLE_OK) {
+                       ctx.name = xcalloc(10, 1);
+                       ctx.len = 0;
+                       ctx.cdata = NULL;
+                       ctx.userFunc = handle_new_lock_ctx;
+                       ctx.userData = new_lock;
+                       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) {
+                               fprintf(stderr, "XML error: %s\n",
+                                       XML_ErrorString(
+                                               XML_GetErrorCode(parser)));
+                               new_lock->timeout = -1;
+                       }
                }
        } else {
-               free(new_lock);
-               free(url);
-               free(out_data);
-               free(in_data);
                fprintf(stderr, "Unable to start request\n");
-               return NULL;
        }
 
+       curl_slist_free_all(dav_headers);
        free(out_data);
-
-       XML_SetUserData(parser, new_lock);
-       XML_SetElementHandler(parser, start_activelock_element,
-                                     end_activelock_element);
-       XML_SetCharacterDataHandler(parser, activelock_cdata);
-       result = XML_Parse(parser, in_buffer.buffer, in_buffer.posn, 1);
        free(in_data);
-       if (result != XML_STATUS_OK) {
-               fprintf(stderr, "%s", XML_ErrorString(
-                               XML_GetErrorCode(parser)));
-               free(url);
-               free(new_lock);
-               return NULL;
-       }
 
        if (new_lock->token == NULL || new_lock->timeout <= 0) {
                if (new_lock->token != NULL)
@@ -1310,15 +964,16 @@ struct active_lock *lock_remote(char *file, long timeout)
                        free(new_lock->owner);
                free(url);
                free(new_lock);
-               return NULL;
+               new_lock = NULL;
+       } else {
+               new_lock->url = url;
+               new_lock->start_time = time(NULL);
        }
 
-       new_lock->url = url;
-       new_lock->start_time = time(NULL);
        return new_lock;
 }
 
-int unlock_remote(struct active_lock *lock)
+static int unlock_remote(struct active_lock *lock)
 {
        struct active_request_slot *slot;
        char *lock_token_header;
@@ -1353,13 +1008,15 @@ int unlock_remote(struct active_lock *lock)
        if (lock->owner != NULL)
                free(lock->owner);
        free(lock->url);
+/* Freeing the token causes a segfault...
        free(lock->token);
+*/
        free(lock);
 
        return rc;
 }
 
-int check_locking()
+static int locking_available(void)
 {
        struct active_request_slot *slot;
        struct buffer in_buffer;
@@ -1368,8 +1025,9 @@ int check_locking()
        char *out_data;
        XML_Parser parser = XML_ParserCreate(NULL);
        enum XML_Status result;
-       struct lockprop supported_lock;
        struct curl_slist *dav_headers = NULL;
+       struct xml_ctx ctx;
+       int lock_flags = 0;
 
        out_buffer.size = strlen(PROPFIND_REQUEST) + strlen(remote->url) - 2;
        out_data = xmalloc(out_buffer.size + 1);
@@ -1390,8 +1048,7 @@ int check_locking()
        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_dynamic);
+       curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
        curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
        curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
        curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
@@ -1399,33 +1056,38 @@ int check_locking()
 
        if (start_active_slot(slot)) {
                run_active_slot(slot);
-               free(out_data);
-               if (slot->curl_result != CURLE_OK) {
-                       free(in_buffer.buffer);
-                       return -1;
+               if (slot->curl_result == CURLE_OK) {
+                       ctx.name = xcalloc(10, 1);
+                       ctx.len = 0;
+                       ctx.cdata = NULL;
+                       ctx.userFunc = handle_lockprop_ctx;
+                       ctx.userData = &lock_flags;
+                       XML_SetUserData(parser, &ctx);
+                       XML_SetElementHandler(parser, xml_start_tag,
+                                             xml_end_tag);
+                       result = XML_Parse(parser, in_buffer.buffer,
+                                          in_buffer.posn, 1);
+                       free(ctx.name);
+
+                       if (result != XML_STATUS_OK) {
+                               fprintf(stderr, "XML error: %s\n",
+                                       XML_ErrorString(
+                                               XML_GetErrorCode(parser)));
+                               lock_flags = 0;
+                       }
                }
-
-               XML_SetUserData(parser, &supported_lock);
-               XML_SetElementHandler(parser, start_lockprop_element,
-                                     end_lockprop_element);
-               result = XML_Parse(parser, in_buffer.buffer, in_buffer.posn, 1);
-               free(in_buffer.buffer);
-               if (result != XML_STATUS_OK)
-                       return error("%s", XML_ErrorString(
-                                            XML_GetErrorCode(parser)));
        } else {
-               free(out_data);
-               free(in_buffer.buffer);
-               return error("Unable to start request");
+               fprintf(stderr, "Unable to start request\n");
        }
 
-       if (supported_lock.lock_exclusive_write)
-               return 0;
-       else
-               return 1;
+       free(out_data);
+       free(in_buffer.buffer);
+       curl_slist_free_all(dav_headers);
+
+       return lock_flags;
 }
 
-int is_ancestor(unsigned char *sha1, struct commit *commit)
+static int is_ancestor(unsigned char *sha1, struct commit *commit)
 {
        struct commit_list *parents;
 
@@ -1446,8 +1108,8 @@ int is_ancestor(unsigned char *sha1, struct commit *commit)
        return 0;
 }
 
-void get_delta(unsigned char *sha1, struct object *obj,
-              struct active_lock *lock)
+static void get_delta(unsigned char *sha1, struct object *obj,
+                     struct active_lock *lock)
 {
        struct commit *commit;
        struct commit_list *parents;
@@ -1503,7 +1165,7 @@ void get_delta(unsigned char *sha1, struct object *obj,
        }
 }
 
-int update_remote(unsigned char *sha1, struct active_lock *lock)
+static int update_remote(unsigned char *sha1, struct active_lock *lock)
 {
        struct active_request_slot *slot;
        char *out_data;
@@ -1560,8 +1222,6 @@ int update_remote(unsigned char *sha1, struct active_lock *lock)
 
 int main(int argc, char **argv)
 {
-       struct active_request_slot *slot;
-       struct active_request_slot *next_slot;
        struct transfer_request *request;
        struct transfer_request *next_request;
        int nr_refspec = 0;
@@ -1576,8 +1236,6 @@ int main(int argc, char **argv)
        unsigned char remote_sha1[20];
        struct active_lock *remote_lock;
        char *remote_path = NULL;
-       char *low_speed_limit;
-       char *low_speed_time;
        int rc = 0;
        int i;
 
@@ -1617,50 +1275,7 @@ int main(int argc, char **argv)
 
        memset(remote_dir_exists, 0, 256);
 
-       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);
-
-       if (curl_ssl_verify == -1)
-               curl_ssl_verify = 1;
-
-#ifdef USE_CURL_MULTI
-       if (max_requests < 1)
-               max_requests = DEFAULT_MAX_REQUESTS;
-#endif
+       http_init();
 
        no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
        default_headers = curl_slist_append(default_headers, "Range:");
@@ -1669,12 +1284,8 @@ int main(int argc, char **argv)
        default_headers = curl_slist_append(default_headers,
                                            "Pragma: no-cache");
 
-#ifndef NO_CURL_EASY_DUPHANDLE
-       curl_default = get_curl_handle();
-#endif
-
        /* Verify DAV compliance/lock support */
-       if (check_locking() != 0) {
+       if (!locking_available()) {
                fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
                rc = 1;
                goto cleanup;
@@ -1766,13 +1377,13 @@ int main(int argc, char **argv)
                        fetch_indices();
                get_delta(push_all ? NULL : remote_sha1,
                          local_object, remote_lock);
-               process_waiting_requests();
+               finish_all_active_slots();
 
                /* Push missing objects to remote, this would be a
                   convenient time to pack them first if appropriate. */
                pushing = 1;
-               process_request_queue();
-               process_waiting_requests();
+               fill_active_slots();
+               finish_all_active_slots();
 
                /* Update the remote branch if all went well */
                if (do_remote_update) {
@@ -1802,14 +1413,7 @@ int main(int argc, char **argv)
        curl_slist_free_all(no_pragma_header);
        curl_slist_free_all(default_headers);
 
-       slot = active_queue_head;
-       while (slot != NULL) {
-               next_slot = slot->next;
-               if (slot->curl != NULL)
-                       curl_easy_cleanup(slot->curl);
-               free(slot);
-               slot = next_slot;
-       }
+       http_cleanup();
 
        request = request_queue_head;
        while (request != NULL) {
@@ -1818,12 +1422,5 @@ int main(int argc, char **argv)
                request = next_request;
        }
 
-#ifndef NO_CURL_EASY_DUPHANDLE
-       curl_easy_cleanup(curl_default);
-#endif
-#ifdef USE_CURL_MULTI
-       curl_multi_cleanup(curlm);
-#endif
-       curl_global_cleanup();
        return rc;
 }