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我在通過C++的curl庫上傳文件時遇到了崩潰問題。我從這個位置使用確切的演示代碼:https://curl.haxx.se/libcurl/c/fileupload.html在CURL的CURL上傳文件時curl_easy_perform()發生崩潰
我在代碼中改變的唯一一件事是上傳位置,上傳到Windows上的本地wamp服務器,以及要上傳的文件證實其開放確定。
我通過Visual Studio 2014和建設捲曲貫穿DLL
從程序的輸出是:
* 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
*然後我在程序行66得到一個崩潰。看起來是這樣的:
res = curl_easy_perform(curl);
正在導致無效參數的問題。我已經驗證curl變量不是null,但是我發現獲取更多調試信息非常困難,調用堆棧只引用DLL中的內存地址。
我可以運行演示上傳後變量並獲得一個頁面,這運行良好,沒有崩潰。上傳文件時只會發生崩潰。
我確切的代碼是:
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;
}
'/ *設置從哪裏讀取(在Windows上,您還需要使用READFUNCTION)* /' – tkausl
啊,很容易錯過。我添加了行 \t curl_easy_setopt(curl,CURLOPT_READFUNCTION,&fread); 而一切似乎工作 – user2783377