in src/main/java/com/facebook/android/Util.java [150:221]
public static String openUrl(String url, String method, Bundle params)
throws MalformedURLException, IOException {
// random string as boundary for multi-part http post
String strBoundary = "3i2ndDfv2rTHiSisAbouNdArYfORhtTPEefj3q2f";
String endLine = "\r\n";
OutputStream os;
if (method.equals("GET")) {
url = url + "?" + encodeUrl(params);
}
Util.logd("Facebook-Util", method + " URL: " + url);
HttpURLConnection conn =
(HttpURLConnection) new URL(url).openConnection();
conn.setRequestProperty("User-Agent", System.getProperties().
getProperty("http.agent") + " FacebookAndroidSDK");
if (!method.equals("GET")) {
Bundle dataparams = new Bundle();
for (String key : params.keySet()) {
Object parameter = params.get(key);
if (parameter instanceof byte[]) {
dataparams.putByteArray(key, (byte[])parameter);
}
}
// use method override
if (!params.containsKey("method")) {
params.putString("method", method);
}
if (params.containsKey("access_token")) {
String decoded_token =
URLDecoder.decode(params.getString("access_token"));
params.putString("access_token", decoded_token);
}
conn.setRequestMethod("POST");
conn.setRequestProperty(
"Content-Type",
"multipart/form-data;boundary="+strBoundary);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setRequestProperty("Connection", "Keep-Alive");
conn.connect();
os = new BufferedOutputStream(conn.getOutputStream());
os.write(("--" + strBoundary +endLine).getBytes());
os.write((encodePostBody(params, strBoundary)).getBytes());
os.write((endLine + "--" + strBoundary + endLine).getBytes());
if (!dataparams.isEmpty()) {
for (String key: dataparams.keySet()){
os.write(("Content-Disposition: form-data; filename=\"" + key + "\"" + endLine).getBytes());
os.write(("Content-Type: content/unknown" + endLine + endLine).getBytes());
os.write(dataparams.getByteArray(key));
os.write((endLine + "--" + strBoundary + endLine).getBytes());
}
}
os.flush();
}
String response = "";
try {
response = read(conn.getInputStream());
} catch (FileNotFoundException e) {
// Error Stream contains JSON that we can parse to a FB error
response = read(conn.getErrorStream());
}
return response;
}