C libcurl get output into a string

You can set a callback function to receive incoming data chunks using curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, myfunc); The callback will take a user defined argument that you can set using curl_easy_setopt(curl, CURLOPT_WRITEDATA, p) Here’s a snippet of code that passes a buffer struct string {*ptr; len} to the callback function and grows that buffer on each call … Read more

How to strip all non alphanumeric characters from a string in c++?

Write a function that takes a char and returns true if you want to remove that character or false if you want to keep it: bool my_predicate(char c); Then use the std::remove_if algorithm to remove the unwanted characters from the string: std::string s = “my data”; s.erase(std::remove_if(s.begin(), s.end(), my_predicate), s.end()); Depending on your requirements, you … Read more

Using cURL in Android

I’m on a similar quest! I’m working on an app right now that requires cURL and just tonight in my search I came across your post here, and what I believe to be the answer: http://thesoftwarerogue.blogspot.com/2010/05/porting-of-libcurl-to-android-os-using.html Unlike the link you referenced, there are several follow-up comments from other people who claim to have success also … Read more

Getting LibCurl to work with Visual Studio 2013

A lot of these instructions are out of date because they recommend the win32-ssl-devel-msvc package for curl, which no longer exists. The following instructions allow you to build libcurl using only: Visual Studio 2013 curl generic source tarball (tested on curl 7.44.0). A. Build libcurl static library Download the latest curl generic source from: http://curl.haxx.se/latest.cgi?curl=tar.gz … Read more

How do you properly install libcurl for use in visual studio 2017?

Here’s how I’ve got curl to work with Visual Studio 2017 15.9.14: Download curl zip package from https://curl.haxx.se/download.html (latest verified is: https://curl.haxx.se/download/curl-7.70.0.zip) Extract downloaded package to a folder of your choice (e.g. C:\curl\) Open Developer Command Prompt for VS 2017 (see Windows Start menu or %PROGRAMDATA%\Microsoft\Windows\Start Menu\Programs\Visual Studio 2017\Visual Studio Tools\) and cd to C:\curl\winbuild\ … Read more

Why can’t Python find shared objects that are in directories in sys.path?

sys.path is only searched for Python modules. For dynamic linked libraries, the paths searched must be in LD_LIBRARY_PATH. Check if your LD_LIBRARY_PATH includes /usr/local/lib, and if it doesn’t, add it and try again. Some more information (source): In Linux, the environment variable LD_LIBRARY_PATH is a colon-separated set of directories where libraries should be searched for … Read more

Download file using libcurl in C/C++

The example you are using is wrong. See the man page for easy_setopt. In the example write_data uses its own FILE, *outfile, and not the fp that was specified in CURLOPT_WRITEDATA. That’s why closing fp causes problems – it’s not even opened. This is more or less what it should look like (no libcurl available … Read more