This is a simple example that shows how to download a file using Ecore\+\_\+\+Con\+\_\+\+Url.

The full source code for this example can be found at \hyperlink{ecore_con_url_download_example_8c-example}{ecore\+\_\+con\+\_\+url\+\_\+download\+\_\+example.\+c}.

First we are setting some callbacks for events that will be sent when data arrives in our connection (the data is the content of the file being downloaded), and when the download is completed. The {\ttfamily \+\_\+url\+\_\+progress\+\_\+cb} and {\ttfamily \+\_\+url\+\_\+complete\+\_\+cb} are these callbacks\+:

 
\begin{DoxyCodeInclude}
\textcolor{keyword}{struct }\_request
\{
   \textcolor{keywordtype}{long} size;
\};

\textcolor{keyword}{static} \hyperlink{group__Eina__Types__Group_ga3fe0caf72e93b1bab1ca8ee3ccf3f226}{Eina\_Bool}
\_url\_progress\_cb(\textcolor{keywordtype}{void} *data EINA\_UNUSED, \textcolor{keywordtype}{int} type EINA\_UNUSED, \textcolor{keywordtype}{void} *event\_info)
\{
   \hyperlink{struct__Ecore__Con__Event__Url__Progress}{Ecore\_Con\_Event\_Url\_Progress} *url\_progress = event\_info;
   \textcolor{keywordtype}{float} percent;

   \textcolor{keywordflow}{if} (url\_progress->\hyperlink{struct__Ecore__Con__Event__Url__Progress_a7a4adc8a74da519dc72f9e54dd70bb9b}{down}.\hyperlink{struct__Ecore__Con__Event__Url__Progress_a4ac5badcaedbbbdab002e162c11ed26b}{total} > 0)
     \{
        \textcolor{keyword}{struct }\_request *req = \hyperlink{group__Ecore__Con__Url__Group_gacad8548217172607bad2d2741935ffaa}{ecore\_con\_url\_data\_get}(url\_progress->
      \hyperlink{struct__Ecore__Con__Event__Url__Progress_a262d26bbc8e5483dc64e819a157a0b62}{url\_con});
        req->size = url\_progress->\hyperlink{struct__Ecore__Con__Event__Url__Progress_a7a4adc8a74da519dc72f9e54dd70bb9b}{down}.\hyperlink{struct__Ecore__Con__Event__Url__Progress_a328d3ce438f4b9b093c4be9a4c8146a2}{now};

        percent = (url\_progress->\hyperlink{struct__Ecore__Con__Event__Url__Progress_a7a4adc8a74da519dc72f9e54dd70bb9b}{down}.\hyperlink{struct__Ecore__Con__Event__Url__Progress_a328d3ce438f4b9b093c4be9a4c8146a2}{now} / url\_progress->\hyperlink{struct__Ecore__Con__Event__Url__Progress_a7a4adc8a74da519dc72f9e54dd70bb9b}{down}.\hyperlink{struct__Ecore__Con__Event__Url__Progress_a4ac5badcaedbbbdab002e162c11ed26b}{total}) * 100;
        printf(\textcolor{stringliteral}{"Total of download complete: %0.1f (%0.0f)%%\(\backslash\)n"},
               percent, url\_progress->\hyperlink{struct__Ecore__Con__Event__Url__Progress_a7a4adc8a74da519dc72f9e54dd70bb9b}{down}.\hyperlink{struct__Ecore__Con__Event__Url__Progress_a328d3ce438f4b9b093c4be9a4c8146a2}{now});
     \}

   \textcolor{keywordflow}{return} \hyperlink{group__Eina__Types__Group_ga05c12dacc8b4058994df842b41be85fc}{EINA\_TRUE};
\}

\textcolor{keyword}{static} \hyperlink{group__Eina__Types__Group_ga3fe0caf72e93b1bab1ca8ee3ccf3f226}{Eina\_Bool}
\_url\_complete\_cb(\textcolor{keywordtype}{void} *data EINA\_UNUSED, \textcolor{keywordtype}{int} type EINA\_UNUSED, \textcolor{keywordtype}{void} *event\_info)
\{
   \hyperlink{struct__Ecore__Con__Event__Url__Complete}{Ecore\_Con\_Event\_Url\_Complete} *url\_complete = event\_info;

   \textcolor{keyword}{struct }\_request *req = \hyperlink{group__Ecore__Con__Url__Group_gacad8548217172607bad2d2741935ffaa}{ecore\_con\_url\_data\_get}(url\_complete->
      \hyperlink{struct__Ecore__Con__Event__Url__Complete_a58335ec0eac21f9c0828695922807039}{url\_con});
   \textcolor{keywordtype}{int} nbytes = \hyperlink{group__Ecore__Con__Url__Group_ga9587eb74811d11b69b281a715b6fd1a1}{ecore\_con\_url\_received\_bytes\_get}(url\_complete->
      \hyperlink{struct__Ecore__Con__Event__Url__Complete_a58335ec0eac21f9c0828695922807039}{url\_con});

   printf(\textcolor{stringliteral}{"\(\backslash\)n"});
   printf(\textcolor{stringliteral}{"download completed with status code: %d\(\backslash\)n"}, url\_complete->\hyperlink{struct__Ecore__Con__Event__Url__Complete_ab842caa1615a911c3578e0dfeae5f773}{status});
   printf(\textcolor{stringliteral}{"Total size of downloaded file: %ld bytes\(\backslash\)n"}, req->size);
   printf(\textcolor{stringliteral}{"Total size of downloaded file: %d bytes "}
          \textcolor{stringliteral}{"(from received\_bytes\_get)\(\backslash\)n"}, nbytes);
   \hyperlink{group__Ecore__Main__Loop__Group_ga95cf8e97dff0716433c2c5474d606a98}{ecore\_main\_loop\_quit}();

   \textcolor{keywordflow}{return} \hyperlink{group__Eina__Types__Group_ga05c12dacc8b4058994df842b41be85fc}{EINA\_TRUE};
\}

\end{DoxyCodeInclude}


Notice that we also declared a struct that will hold how many bytes were downloaded through this object. It will be set in the {\ttfamily main} function using \hyperlink{group__Ecore__Con__Url__Group_ga194f122b9e4e9f2aa9b5c2f07e9d7f3e}{ecore\+\_\+con\+\_\+url\+\_\+data\+\_\+set()}.

In the next step, on the {\ttfamily main} function, we open a file where we are going to save the content being downloaded\+:


\begin{DoxyCodeInclude}

\textcolor{keywordtype}{int}
main(\textcolor{keywordtype}{int} argc, \textcolor{keyword}{const} \textcolor{keywordtype}{char} *argv[])
\{
   Ecore\_Con\_Url *ec\_url = NULL;
   \textcolor{keyword}{struct }\_request *req;
   \textcolor{keywordtype}{int} fd;
   \textcolor{keyword}{const} \textcolor{keywordtype}{char} *filename = \textcolor{stringliteral}{"downloadedfile.dat"};

   \textcolor{keywordflow}{if} (argc < 2)
     \{
        printf(\textcolor{stringliteral}{"need one parameter: <url>\(\backslash\)n"});
        \textcolor{keywordflow}{return} -1;
     \}

   fd = open(filename, O\_CREAT | O\_WRONLY | O\_TRUNC, 0644);

   \textcolor{keywordflow}{if} (fd == -1)
     \{
        printf(\textcolor{stringliteral}{"error: could not open file for writing: \(\backslash\)"%s\(\backslash\)"\(\backslash\)n"},
               filename);
        \textcolor{keywordflow}{return} -1;
     \}

\end{DoxyCodeInclude}


With the file successfully open, let's create our Ecore\+\_\+\+Con\+\_\+\+Url object. For this, we initialize the libraries and create the object\+:


\begin{DoxyCodeInclude}

   \hyperlink{group__Ecore__Init__Group_ga77757609684a2c922dc5ec398274751b}{ecore\_init}();
   \hyperlink{group__Ecore__Con__Events__Group_gacf5ecf42c516bb9c8b6759721e9559bd}{ecore\_con\_init}();
   \hyperlink{group__Ecore__Con__Url__Group_gac3fbeaf9cde529362e4567fc37e45c9f}{ecore\_con\_url\_init}();

   ec\_url = \hyperlink{group__Ecore__Con__Url__Group_gae40b7c1a94413166c61524b707118f19}{ecore\_con\_url\_new}(argv[1]);
   \textcolor{keywordflow}{if} (!ec\_url)
     \{
        printf(\textcolor{stringliteral}{"error when creating ecore con url object.\(\backslash\)n"});
        \textcolor{keywordflow}{goto} end;
     \}

\end{DoxyCodeInclude}


Then we allocate and set the data struct to the connection object, and set a file descriptor from our previously open file to it. We also add the event handlers (callbacks) to the events that will be emitted on data being received and download complete\+:


\begin{DoxyCodeInclude}

   req = malloc(\textcolor{keyword}{sizeof}(*req));
   req->size = 0;
   \hyperlink{group__Ecore__Con__Url__Group_ga194f122b9e4e9f2aa9b5c2f07e9d7f3e}{ecore\_con\_url\_data\_set}(ec\_url, req);

   \hyperlink{group__Ecore__Con__Url__Group_ga7b58b82b9b49060642ad3fe64348dc8d}{ecore\_con\_url\_fd\_set}(ec\_url, fd);

   \hyperlink{group__Ecore__Event__Group_gae75b0b1b2c50e73b8e42afc628b00a62}{ecore\_event\_handler\_add}(\hyperlink{group__Ecore__Con__Events__Group_ga2a169e3fec20576f464b844df18143f8}{ECORE\_CON\_EVENT\_URL\_PROGRESS},
       \_url\_progress\_cb, NULL);
   \hyperlink{group__Ecore__Event__Group_gae75b0b1b2c50e73b8e42afc628b00a62}{ecore\_event\_handler\_add}(\hyperlink{group__Ecore__Con__Events__Group_gae90b9b857e1e0adc0c7f24e7ccecb44b}{ECORE\_CON\_EVENT\_URL\_COMPLETE},
       \_url\_complete\_cb, NULL);

\end{DoxyCodeInclude}


Finally we start our request, and run the main loop\+:


\begin{DoxyCodeInclude}

   \textcolor{keywordflow}{if} (!\hyperlink{group__Ecore__Con__Url__Group_ga46f75358256eec26bd99eef96b25ffa8}{ecore\_con\_url\_get}(ec\_url))
     \{
        printf(\textcolor{stringliteral}{"could not realize request.\(\backslash\)n"});
        \textcolor{keywordflow}{goto} free\_ec\_url;
     \}

   \hyperlink{group__Ecore__Main__Loop__Group_gaf103b9f668bb3e4fed12e52c6180132d}{ecore\_main\_loop\_begin}();

free\_ec\_url:
   free(req);
   \hyperlink{group__Ecore__Con__Url__Group_ga711510886aaece16f5dee6903c603fb2}{ecore\_con\_url\_free}(ec\_url);
end:

   close(fd);
   \hyperlink{group__Ecore__Con__Url__Group_ga0da252aa2c919722894dd41cc6549435}{ecore\_con\_url\_shutdown}();
   \hyperlink{group__Ecore__Con__Events__Group_gaccfd8dd2a1187b71339b5cc39dc83938}{ecore\_con\_shutdown}();
   \hyperlink{group__Ecore__Init__Group_ga768298b932f18d7e7593a447493e5cde}{ecore\_shutdown}();

   \textcolor{keywordflow}{return} 0;
\}

\end{DoxyCodeInclude}


The rest of this code was just freeing resources, with some labels to be used for error handling. 