当我在一些业余时间进行Android学习时,我遇到了HttpPost
请求的奇怪行为。
我想要实现的目标: 从Android应用程序向我的开发PC上运行的Apache Web服务器发出简单的POST请求,并显示发送表单的PHP脚本的POSTed数据。
我的Android应用 Java代码位于Activity
AsyncTask
内,如下所示:
private class DoSampleHttpPostRequest extends AsyncTask<Void, Void, CharSequence> {
@Override
protected CharSequence doInBackground(Void... params) {
BufferedReader in = null;
String baseUrl = "http://10.0.2.2:8080/android";
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost(baseUrl);
List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("login", "someuser"));
postParameters.add(new BasicNameValuePair("data", "somedata"));
UrlEncodedFormEntity form = new UrlEncodedFormEntity(postParameters);
request.setEntity(form);
Log.v("log", "making POST request to: " + baseUrl);
HttpResponse response = httpClient.execute(request);
in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}
in.close();
return sb.toString();
} catch (Exception e) {
return "Exception happened: " + e.getMessage();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@Override
protected void onPostExecute(CharSequence result) {
// this refers to a TextView defined as a private field in the parent Activity
textView.setText(result);
}
}
我的 PHP代码如下:
<?php
echo "Hello<br />";
var_dump($_SERVER);
if ($_SERVER["REQUEST_METHOD"] == "POST") {
echo "Page was posted:<br />";
foreach($_POST as $key=>$var) {
echo "[$key] => $var<br />";
}
}
?>
最后问题:
正如您所看到的,$_SERVER
内容被转储,而输出$_SERVER["REQUEST_METHOD"]
中的值GET
尽管我实际上正在发出POST
请求。即使我尝试转储$_POST
的内容,它也是空的。
我做错了什么?提前致谢。
答案 0 :(得分:2)
您可能需要在网址末尾指定一个尾部斜杠。
Apache经常重定向不以尾部斜杠结尾的请求,以便它们包含尾部斜杠。该重定向是一个GET重定向(没有一些调整),因此所有POST数据都会丢失。