curl_easy_strerror: Failed to open/read local data from file/application
时间: 2024-05-27 07:13:59 浏览: 186
This error message is indicating that the curl_easy function was unable to access the local data from a file or application. This could be due to a variety of reasons, such as the file or application being corrupted, the file or application being in use by another process, or insufficient permissions to access the file or application. To resolve this issue, you should check the file or application for any errors or issues, ensure that it is not being used by another process, and make sure that you have the necessary permissions to access the file or application.
相关问题
FAILED: MyTestHttp : && /usr/bin/c++ -g CMakeFiles/MyTestHttp.dir/main.cpp.o -o MyTestHttp && : /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::Http()': /home/hy-20/project/MyTestHttp/main.cpp:20: undefined reference to `curl_global_init' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:21: undefined reference to `curl_easy_init' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::~Http()': /home/hy-20/project/MyTestHttp/main.cpp:25: undefined reference to `curl_easy_cleanup' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:26: undefined reference to `curl_global_cleanup' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setUrl(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:29: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setPostFields(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:31: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setMethod(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:35: undefined reference to `curl_easy_setopt' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:36: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setHeaders(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)': /home/hy-20/project/MyTestHttp/main.cpp:41: undefined reference to `curl_slist_append' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:42: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::setWriteFunction(std::function<void (std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)> const&)': /home/hy-20/project/MyTestHttp/main.cpp:46: undefined reference to `curl_easy_setopt' /usr/bin/ld: /home/hy-20/project/MyTestHttp/main.cpp:47: undefined reference to `curl_easy_setopt' /usr/bin/ld: CMakeFiles/MyTestHttp.dir/main.cpp.o: in function `Http::perform()': /home/hy-20/project/MyTestHttp/main.cpp:50: undefined reference to `curl_easy_perform' collect2: error: ld returned 1 exit status ninja: build stopped: subcommand failed.
这是一个链接错误,编译器找不到 curl 库的函数。你需要在链接时加上 curl 库。如果你使用的是 CMake,可以在 CMakeLists.txt 中添加以下代码:
```
find_package(CURL REQUIRED)
target_link_libraries(YourProjectName ${CURL_LIBRARIES})
```
其中,YourProjectName 是你的项目名称。
介绍一下 curl_easy_strerror函数
`curl_easy_strerror()` 是一个用于将 CURLcode 错误代码转换为人类可读的错误消息的函数。该函数接受一个 CURLcode 参数,并返回一个指向字符串的指针,该字符串描述了该错误的详细信息。如果传入的 CURLcode 参数是 CURLcode 类型中的一个有效值,则该函数将返回对应的错误消息字符串。如果 CURLcode 参数是未知的或无效的,则该函数将返回一个通用错误消息字符串。
例如,如果 `curl_easy_perform()` 函数返回一个错误代码,我们可以使用 `curl_easy_strerror()` 函数来获取该错误的详细信息,并将其输出到日志文件中。这样,我们就可以更好地了解问题所在,以便诊断和解决问题。
下面是一个示例代码片段,演示如何使用 `curl_easy_strerror()` 函数:
```c
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK) {
fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
}
```