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authorDaniel Stenberg <daniel@haxx.se>2001-01-26 15:49:39 +0000
committerDaniel Stenberg <daniel@haxx.se>2001-01-26 15:49:39 +0000
commit3a3f632bf0e1d65a2bd5ab4ff47c6bd7f5e0e474 (patch)
treed5fbdc863b8bbea04a850cd22e5034c1e6e0b9aa /lib
parent68d7b6f87116087bd00b1f1f0c899cea71adb5da (diff)
Made it possible to do "upload resume" over HTTP
Diffstat (limited to 'lib')
-rw-r--r--lib/http.c58
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/http.c b/lib/http.c
index 5fff27bc4..a9b9c5d97 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -471,6 +471,64 @@ CURLcode Curl_http(struct connectdata *conn)
if(!checkheaders(data, "Accept:"))
http->p_accept = "Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*\r\n";
+ if((data->bits.http_post ||
+ data->bits.http_formpost ||
+ data->bits.http_put) &&
+ data->resume_from) {
+ /**********************************************************************
+ * Resuming upload in HTTP means that we PUT or POST and that we have
+ * got a resume_from value set. The resume value has already created
+ * a Range: header that will be passed along. We need to "fast forward"
+ * the file the given number of bytes and decrease the assume upload
+ * file size before we continue this venture in the dark lands of HTTP.
+ *********************************************************************/
+
+ if(data->resume_from < 0 ) {
+ /*
+ * This is meant to get the size of the present remote-file by itself.
+ * We don't support this now. Bail out!
+ */
+ data->resume_from = 0;
+ }
+
+ if(data->resume_from) {
+ /* do we still game? */
+ int passed=0;
+
+ /* Now, let's read off the proper amount of bytes from the
+ input. If we knew it was a proper file we could've just
+ fseek()ed but we only have a stream here */
+ do {
+ int readthisamountnow = (data->resume_from - passed);
+ int actuallyread;
+
+ if(readthisamountnow > BUFSIZE)
+ readthisamountnow = BUFSIZE;
+
+ actuallyread =
+ data->fread(data->buffer, 1, readthisamountnow, data->in);
+
+ passed += actuallyread;
+ if(actuallyread != readthisamountnow) {
+ failf(data, "Could only read %d bytes from the input\n",
+ passed);
+ return CURLE_READ_ERROR;
+ }
+ } while(passed != data->resume_from); /* loop until done */
+
+ /* now, decrease the size of the read */
+ if(data->infilesize>0) {
+ data->infilesize -= data->resume_from;
+
+ if(data->infilesize <= 0) {
+ failf(data, "File already completely uploaded\n");
+ return CURLE_PARTIAL_FILE;
+ }
+ }
+ /* we've passed, proceed as normal */
+ }
+ }
+
do {
send_buffer *req_buffer;
struct curl_slist *headers=data->headers;