[英]method does not support a request body: GET/POST
無法將GET或POST回復請求發送到服務器,出現以下錯誤
java.net.ProtocolException: method does not support a request body: GET/POST
我試圖做的是讀取站點內容並計算一個簡單的數學方程式,然后在其中生成並將答案發送回服務器。 無法弄清楚為什么會引發異常以及如何解決我的問題。
class HTTPRequest extends AsyncTask<String, String, String> {
String field1;
String field2;
public HTTPRequest (String arg1, String arg2) {
field1 = arg1;
field2 = arg2;
}
@Override
protected String doInBackground(String... urls) {
try {
URL url = new URL(urls[0]);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.setChunkedStreamingMode(0);
InputStream in = new BufferedInputStream(conn.getInputStream());
String html = readStream(in);
Pattern pattern = Pattern.compile("\\t+(\\d+) ([+-]) (\\d+) = <input name=\"answer\"");
Matcher matcher = pattern.matcher(html);
Integer res = null;
if (matcher.find()) {
if (matcher.group(2).equals("-"))
res = Integer.parseInt(matcher.group(1)) - Integer.parseInt(matcher.group(3));
else if (matcher.group(2).equals("+"))
res = Integer.parseInt(matcher.group(1)) + Integer.parseInt(matcher.group(3));
}
//Result is calculated! sending POST request
if (res != null) {
Log.d("RESULT", Integer.toString(res));
String data = URLEncoder.encode("field1", "UTF-8")
+ "=" + URLEncoder.encode(field1, "UTF-8");
data += "&" + URLEncoder.encode("field2", "UTF-8") + "="
+ URLEncoder.encode(field2, "UTF-8");
data += "&" + URLEncoder.encode("answer", "UTF-8") + "="
+ URLEncoder.encode(Integer.toString(res), "UTF-8");
//ERR ON THIS LINE
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(data);
wr.flush();
wr.close();
BufferedReader in1 = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in1.readLine()) != null) {
response.append(inputLine);
}
in.close();
Log.d("RESPONE",respone);
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private String readStream(InputStream is) throws IOException {
StringBuilder sb = new StringBuilder();
BufferedReader r = new BufferedReader(new InputStreamReader(is),1000);
for (String line = r.readLine(); line != null; line =r.readLine()){
sb.append(line);
sb.append(System.getProperty("line.separator"));
}
is.close();
return sb.toString();
}
}
追溯:
System.err: java.net.ProtocolException: method does not support a request body: POST
System.err: at libcore.net.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:201)
System.err: at com.streak.myapp.HTTPRequest.doInBackground(HTTPRequest.java:73)
System.err: at com.streak.myapp.HTTPRequest.doInBackground(HTTPRequest.java:24)
System.err: at android.os.AsyncTask$2.call(AsyncTask.java:287)
System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:234)
System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
System.err: at java.lang.Thread.run(Thread.java:841)
通過添加解決了我的問題
CookieHandler.setDefault( new CookieManager( null, CookiePolicy.ACCEPT_ALL ) );
並創建與同一主機的新連接。
@Override
protected Void doInBackground(String... urls) {
CookieHandler.setDefault( new CookieManager( null, CookiePolicy.ACCEPT_ALL ) );
String data="";
try {
URL url = new URL(urls[0]);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
InputStream in = new BufferedInputStream(conn.getInputStream());
String html = readStream(in);
Pattern pattern = Pattern.compile("\\t+(\\d+) ([+-]) (\\d+) = <input name=\"answer\"");
Matcher matcher = pattern.matcher(html);
Integer res = null;
if (matcher.find()) {
if (matcher.group(2).equals("-"))
res = Integer.parseInt(matcher.group(1)) - Integer.parseInt(matcher.group(3));
else if (matcher.group(2).equals("+"))
res = Integer.parseInt(matcher.group(1)) + Integer.parseInt(matcher.group(3));
}
if (res != null) {
data += URLEncoder.encode("field1", "UTF-8")
+ "=" + URLEncoder.encode(field1, "UTF-8");
data += "&" + URLEncoder.encode("field2", "UTF-8") + "="
+ URLEncoder.encode(field2, "UTF-8");
data += "&" + URLEncoder.encode("answer", "UTF-8") + "="
+ URLEncoder.encode(Integer.toString(res), "UTF-8");
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
URL url = new URL(urls[0]);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("charset", "utf-8");
conn.setDoOutput(true); //ENABLE POST REQUEST
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(data);
wr.flush(); wr.close();
InputStream in = new BufferedInputStream(conn.getInputStream());
data = readStream(in);
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// Now data==final html respond
Document doc = Jsoup.parse(data);
Elements allAnchorTags = doc.select("tr");
return null;
}
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