mirror of
https://github.com/moparisthebest/curl
synced 2024-08-13 17:03:50 -04:00
9f44a95522
and allow reuse by multiple protocols. Several unused error codes were removed. In all cases, macros were added to preserve source (and binary) compatibility with the old names. These macros are subject to removal at a future date, but probably not before 2009. An application can be tested to see if it is using any obsolete code by compiling it with the CURL_NO_OLDIES macro defined. Documented some newer error codes in libcurl-error(3)
157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
/*****************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* $Id$
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*
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* Upload to FTP, resuming failed transfers
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*
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* Compile for MinGW like this:
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* gcc -Wall -pedantic -std=c99 ftpuploadwithresume.c -o ftpuploadresume.exe
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* -lcurl -lmsvcr70
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*
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* Written by Philip Bock
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <curl/curl.h>
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/* The MinGW headers are missing a few Win32 function definitions,
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you shouldn't need this if you use VC++ */
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#ifdef __MINGW32__
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int __cdecl _snscanf(const char * input, size_t length, const char * format, ...);
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#endif
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/* parse headers for Content-Length */
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size_t getcontentlengthfunc(void *ptr, size_t size, size_t nmemb, void *stream) {
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int r;
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long len = 0;
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/* _snscanf() is Win32 specific */
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r = _snscanf(ptr, size * nmemb, "Content-Length: %ld\n", &len);
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if (r) /* Microsoft: we don't read the specs */
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*((long *) stream) = len;
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return size * nmemb;
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}
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/* discard downloaded data */
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size_t discardfunc(void *ptr, size_t size, size_t nmemb, void *stream) {
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return size * nmemb;
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}
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/* read data to upload */
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size_t readfunc(void *ptr, size_t size, size_t nmemb, void *stream)
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{
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FILE *f = stream;
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size_t n;
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if (ferror(f))
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return CURL_READFUNC_ABORT;
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n = fread(ptr, size, nmemb, f) * size;
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return n;
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}
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int upload(CURL *curlhandle, const char * remotepath, const char * localpath,
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long timeout, long tries)
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{
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FILE *f;
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long uploaded_len = 0;
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CURLcode r = CURLE_GOT_NOTHING;
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int c;
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f = fopen(localpath, "rb");
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if (f == NULL) {
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perror(NULL);
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return 0;
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}
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curl_easy_setopt(curlhandle, CURLOPT_UPLOAD, 1);
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curl_easy_setopt(curlhandle, CURLOPT_URL, remotepath);
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if (timeout)
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curl_easy_setopt(curlhandle, CURLOPT_FTP_RESPONSE_TIMEOUT, timeout);
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curl_easy_setopt(curlhandle, CURLOPT_HEADERFUNCTION, getcontentlengthfunc);
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curl_easy_setopt(curlhandle, CURLOPT_HEADERDATA, &uploaded_len);
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curl_easy_setopt(curlhandle, CURLOPT_WRITEFUNCTION, discardfunc);
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curl_easy_setopt(curlhandle, CURLOPT_READFUNCTION, readfunc);
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curl_easy_setopt(curlhandle, CURLOPT_READDATA, f);
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curl_easy_setopt(curlhandle, CURLOPT_FTPPORT, "-"); /* disable passive mode */
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curl_easy_setopt(curlhandle, CURLOPT_FTP_CREATE_MISSING_DIRS, 1);
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curl_easy_setopt(curlhandle, CURLOPT_VERBOSE, 1);
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for (c = 0; (r != CURLE_OK) && (c < tries); c++) {
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/* are we resuming? */
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if (c) { /* yes */
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/* determine the length of the file already written */
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/*
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* With NOBODY and NOHEADER, libcurl will issue a SIZE
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* command, but the only way to retrieve the result is
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* to parse the returned Content-Length header. Thus,
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* getcontentlengthfunc(). We need discardfunc() above
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* because HEADER will dump the headers to stdout
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* without it.
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*/
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curl_easy_setopt(curlhandle, CURLOPT_NOBODY, 1);
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curl_easy_setopt(curlhandle, CURLOPT_HEADER, 1);
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r = curl_easy_perform(curlhandle);
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if (r != CURLE_OK)
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continue;
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curl_easy_setopt(curlhandle, CURLOPT_NOBODY, 0);
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curl_easy_setopt(curlhandle, CURLOPT_HEADER, 0);
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fseek(f, uploaded_len, SEEK_SET);
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curl_easy_setopt(curlhandle, CURLOPT_APPEND, 1);
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}
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else { /* no */
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curl_easy_setopt(curlhandle, CURLOPT_APPEND, 0);
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}
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r = curl_easy_perform(curlhandle);
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}
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fclose(f);
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if (r == CURLE_OK)
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return 1;
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else {
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fprintf(stderr, "%s\n", curl_easy_strerror(r));
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return 0;
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}
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}
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int main(int c, char **argv) {
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CURL *curlhandle = NULL;
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curl_global_init(CURL_GLOBAL_ALL);
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curlhandle = curl_easy_init();
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upload(curlhandle, "ftp://user:pass@host/path/file", "C:\\file", 0, 3);
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curl_easy_cleanup(curlhandle);
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curl_global_cleanup();
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return 0;
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}
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