curl_easy_perform:无法解析主机名 [英] curl_easy_perform: Couldn't resolve host name

问题描述

libcurl 有点奇怪的问题-它拒绝解析特定的URL，并返回错误消息无法解析主机名".解决其他主机没有问题.我怀疑原因是失败的URL返回了302重定向，但我已经设置了适当的选项来遵循它.

I'm having a bit of an odd issue with libcurl - it's refusing to resolve a particular URL, returning the error message "Couldn't resolve host name." It has no issues resolving other hosts. I suspect the reason is that the URL which fails returns a 302 redirect, but I've set appropriate options for it to be followed.

有问题的网址: http://servermods.cursecdn.com/files/922/48/worldedit-bukkit-6.1.3.jar

相关代码:

CURL* curl;
FILE* data;
std::string url;

// ...

curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
curl_easy_setopt(curl, CURLOPT_FILE, data);
curl_easy_setopt(curl, CURLOPT_URL, url);

curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);

CURLcode res = curl_easy_perform(curl);

推荐答案

libcurl 需要 CURLOPT_URL 的 char * .我的代码正在传递 string .这实质上会导致库错误地解释字符串，并且无法解析主机.

libcurl expects a char* for CURLOPT_URL. My code was passing a string. This essentially causes the library to misinterpret the string and fail to resolve the host.

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