diff options
| -rw-r--r-- | docs/examples/ftpupload.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/docs/examples/ftpupload.c b/docs/examples/ftpupload.c index f4d3384ea..db209a78d 100644 --- a/docs/examples/ftpupload.c +++ b/docs/examples/ftpupload.c @@ -32,6 +32,22 @@ #define REMOTE_URL "ftp://localhost/" UPLOAD_FILE_AS #define RENAME_FILE_TO "renamed-and-fine.txt" +/* NOTE: if you want this example to work on Windows with libcurl as a + DLL, you MUST also provide a read callback with + CURLOPT_READFUNCTION. Failing to do so will give you a crash since a + DLL may not use the variable's memory when passed in to it from an app + like this. */ +static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *stream) +{ + /* in real-world cases, this would probably get this data differently + as this fread() stuff is exactly what the library already would do + by default internally */ + size_t retcode = fread(ptr, size, nmemb, stream); + + fprintf(stderr, "*** We read %d bytes from file\n", retcode); + return retcode; +} + int main(int argc, char **argv) { CURL *curl; @@ -63,6 +79,9 @@ int main(int argc, char **argv) headerlist = curl_slist_append(headerlist, buf_1); headerlist = curl_slist_append(headerlist, buf_2); + /* we want to use our own read function */ + curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback); + /* enable uploading */ curl_easy_setopt(curl, CURLOPT_UPLOAD, 1) ; @@ -75,12 +94,6 @@ int main(int argc, char **argv) /* now specify which file to upload */ curl_easy_setopt(curl, CURLOPT_READDATA, hd_src); - /* NOTE: if you want this example to work on Windows with libcurl as a - DLL, you MUST also provide a read callback with - CURLOPT_READFUNCTION. Failing to do so will give you a crash since a - DLL may not use the variable's memory when passed in to it from an app - like this. */ - /* Set the size of the file to upload (optional). If you give a *_LARGE option you MUST make sure that the type of the passed-in argument is a curl_off_t. If you use CURLOPT_INFILESIZE (without _LARGE) you must |