downloading image for sfml resource use

[metulburr]

I havent dabbed at all yet into network of sfml yet. My overall goal was to make a function in which could download an image for me so that i could use it as a sprite. I skimmed the network docs but i dont see such related exactly to it. I pieced together code from what i found on these forums. However the object http was not mentioned in the thread as to what is was. So i guessed as if it was sf::Http. However when doing that though i get errors. I am not sure what exactly is wrong? What am i missing?

#include <SFML/Network.hpp>
#include <fstream>

int main(){
    std::string url = "http://s1297.photobucket.com/user/metulburr/media/walker_zpsbd2d34be.png.html";
    sf::Http http;
    sf::Http::Request req(url);
    sf::Http::Response image_res = http.sendRequest(req);

    std::string body = image_res.getBody();
    std::ofstream file;
    file.open("tux.png", std::ios::binary);
    file.write(body.c_str(), body.size());
    file.close();
}

the thread i am talking about is:
http://en.sfml-dev.org/forums/index.php?topic=8160.0

[Laurent]

However when doing that though i get errors.

Are we supposed to guess which errors?

[G.]

Your code compiles and runs without any error, and since you didn't say which errors you had... 
You can also check the status code of the response to know more about what went wrong. And I'd suggest you use Http and Request like they are used in the documentation.

BTW trying to save an .html page inside a .png isn't always a great idea.

[metulburr]

oh whoops sorry.

The error i get is:

Code: [Select]

/tmp/ccRlWxMK.o: In function `main':
test2.cpp:(.text+0x5f): undefined reference to `sf::Http::Http()'
test2.cpp:(.text+0xae): undefined reference to `sf::Http::Request::Request(std::string const&, sf::Http::Request::Method, std::string const&)'
test2.cpp:(.text+0xf0): undefined reference to `sf::Http::sendRequest(sf::Http::Request const&, sf::Time)'
test2.cpp:(.text+0xff): undefined reference to `sf::Http::Response::getBody() const'
/tmp/ccRlWxMK.o: In function `sf::TcpSocket::~TcpSocket()':
test2.cpp:(.text._ZN2sf9TcpSocketD2Ev[_ZN2sf9TcpSocketD5Ev]+0x2f): undefined reference to `sf::Socket::~Socket()'
/tmp/ccRlWxMK.o:(.rodata._ZTIN2sf9TcpSocketE[_ZTIN2sf9TcpSocketE]+0x10): undefined reference to `typeinfo for sf::Socket'
collect2: error: ld returned 1 exit status


[Laurent]

You must link to sfml-network.

[metulburr]

omg, that was a stupid mistake

thank you

[metulburr]

OK now though the image is not able to open. It doenst save the image as expected? Is there something else missing that is stopping this?

[kimci86]

You have to set http host target and only give the URI to the request constructor.
Have a look at the documentation

This code should work. Notice I use a reference to response body so it is not copied in a new string.

#include <SFML/Network.hpp>
#include <fstream>

int main(){
    sf::Http http("i1297.photobucket.com");
    sf::Http::Request req("/albums/ag23/metulburr/walker_zpsbd2d34be.png");
    sf::Http::Response image_res = http.sendRequest(req);

    const std::string& body = image_res.getBody();
    std::ofstream file("tux.png", std::ios::binary);
    file.write(body.c_str(), body.size());
}