Merge git://repo.or.cz/git-gui

[git.git] / http.c

diff --git a/http.c b/http.c
index dcc569343e20abfbf6df06fd7346a6a5bca5bba8..d2c11aee9077e0834c5c56b1284df478eb8debbc 100644 (file)
--- a/http.c
+++ b/http.c
@@ -552,3 +552,85 @@ void finish_all_active_slots(void)
                        slot = slot->next;
                }
 }
+
+static inline int needs_quote(int ch)
+{
+       if (((ch >= 'A') && (ch <= 'Z'))
+                       || ((ch >= 'a') && (ch <= 'z'))
+                       || ((ch >= '0') && (ch <= '9'))
+                       || (ch == '/')
+                       || (ch == '-')
+                       || (ch == '.'))
+               return 0;
+       return 1;
+}
+
+static inline int hex(int v)
+{
+       if (v < 10) return '0' + v;
+       else return 'A' + v - 10;
+}
+
+static char *quote_ref_url(const char *base, const char *ref)
+{
+       const char *cp;
+       char *dp, *qref;
+       int len, baselen, ch;
+
+       baselen = strlen(base);
+       len = baselen + 7; /* "/refs/" + NUL */
+       for (cp = ref; (ch = *cp) != 0; cp++, len++)
+               if (needs_quote(ch))
+                       len += 2; /* extra two hex plus replacement % */
+       qref = xmalloc(len);
+       memcpy(qref, base, baselen);
+       memcpy(qref + baselen, "/refs/", 6);
+       for (cp = ref, dp = qref + baselen + 6; (ch = *cp) != 0; cp++) {
+               if (needs_quote(ch)) {
+                       *dp++ = '%';
+                       *dp++ = hex((ch >> 4) & 0xF);
+                       *dp++ = hex(ch & 0xF);
+               }
+               else
+                       *dp++ = ch;
+       }
+       *dp = 0;
+
+       return qref;
+}
+
+int http_fetch_ref(const char *base, const char *ref, unsigned char *sha1)
+{
+       char *url;
+       struct strbuf buffer = STRBUF_INIT;
+       struct active_request_slot *slot;
+       struct slot_results results;
+       int ret;
+
+       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 (results.curl_result == CURLE_OK) {
+                       strbuf_rtrim(&buffer);
+                       if (buffer.len == 40)
+                               ret = get_sha1_hex(buffer.buf, sha1);
+                       else
+                               ret = 1;
+               } else {
+                       ret = error("Couldn't get %s for %s\n%s",
+                                   url, ref, curl_errorstr);
+               }
+       } else {
+               ret = error("Unable to start request");
+       }
+
+       strbuf_release(&buffer);
+       free(url);
+       return ret;
+}