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我在通过C++的curl库上传文件时遇到了崩溃问题。我从这个位置使用确切的演示代码:https://curl.haxx.se/libcurl/c/fileupload.html在CURL的CURL上传文件时curl_easy_perform()发生崩溃
我在代码中改变的唯一一件事是上传位置,上传到Windows上的本地wamp服务器,以及要上传的文件证实其开放确定。
我通过Visual Studio 2014和建设卷曲贯穿DLL
从程序的输出是:
* Trying 127.0.0.1...
* TCP_NODELAY set
* Connected to 127.0.0.1 (127.0.0.1) port 80 (#0)
> PUT /replayupload.php HTTP/1.1
Host: 127.0.0.1
Accept: */*
Content-Length: 43
Expect: 100-continue
< HTTP/1.1 100 Continue
*然后我在程序行66得到一个崩溃。看起来是这样的:
res = curl_easy_perform(curl);
正在导致无效参数的问题。我已经验证curl变量不是null,但是我发现获取更多调试信息非常困难,调用堆栈只引用DLL中的内存地址。
我可以运行演示上传后变量并获得一个页面,这运行良好,没有崩溃。上传文件时只会发生崩溃。
我确切的代码是:
int main(void)
{
CURL *curl;
CURLcode res;
struct stat file_info;
double speed_upload, total_time;
FILE *fd;
fd = fopen("E:\\testfiles\\test.txt", "rb"); /* open file to upload */
if (!fd)
return 1; /* can't continue */
/* to get the file size */
if (fstat(_fileno(fd), &file_info) != 0)
return 1; /* can't continue */
curl = curl_easy_init();
if (curl) {
/* upload to this place */
curl_easy_setopt(curl, CURLOPT_URL,
"http://127.0.0.1/testupload.php");
/* tell it to "upload" to the URL */
curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
/* set where to read from (on Windows you need to use READFUNCTION too) */
curl_easy_setopt(curl, CURLOPT_READDATA, fd);
/* and give the size of the upload (optional) */
curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
(curl_off_t)file_info.st_size);
/* enable verbose for easier tracing */
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
res = curl_easy_perform(curl);
/* Check for errors */
if (res != CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
}
else {
/* now extract transfer info */
curl_easy_getinfo(curl, CURLINFO_SPEED_UPLOAD, &speed_upload);
curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &total_time);
fprintf(stderr, "Speed: %.3f bytes/sec during %.3f seconds\n",
speed_upload, total_time);
}
/* always cleanup */
curl_easy_cleanup(curl);
}
fclose(fd);
return 0;
}
'/ *设置从哪里读取(在Windows上,您还需要使用READFUNCTION)* /' – tkausl
啊,很容易错过。我添加了行 \t curl_easy_setopt(curl,CURLOPT_READFUNCTION,&fread); 而一切似乎工作 – user2783377