我正在向 android 中的网址 https://nitos.gr 发出Http POST请求。
网址没有域名。 Stackoverflow不允许我在我的文本中包含带有数字的URL,因此我只想写一个随机网址https://nitos.gr来获取示例。
我得到 400 响应代码,并打印getErrorStream(),提供libcore.net.http.UnknownLengthHttpInputStream@41eba330
但是,我成功执行了HTTP GET请求。网址为 https ,因此我有一个假信任管理器,允许所有SSL连接。
总结:
协议: HTTPS
获取请求成功
POST请求失败
请求代码: 400
错误消息: java.io.FileNotFoundException:https://nitos.gr
ErrorStream: java.io.FileNotFoundException:https://nitos.gr
执行POST请求的方法如下:
public void setTestbedData(String path, String data) {
HttpURLConnection con = null;
try {
con = (HttpURLConnection) ( new URL(Constants.BASE_URL + path)).openConnection();
// If you invoke the method setDoOutput(true) on the URLConnection, it will always use the POST method.
con.setRequestMethod("POST");
con.setDoInput(true);
con.setDoOutput(true);
con.setRequestProperty("Accept", "application/json");
con.setRequestProperty("Content-Type", "application/json");
Log.i("data", data);
OutputStream outputStream = con.getOutputStream();
outputStream.write(data.getBytes());
outputStream.flush();
Log.w("RESPONSE CODE", "code " + con.getResponseCode());
Log.w("this is connection ",""+con);
InputStream errorstream = con.getErrorStream();
Log.w("GetErrorStream ", ""+errorstream);
InputStream _is;
if (con.getResponseCode() >= 400) {
_is = con.getInputStream();
} else {
_is = con.getErrorStream();
String result = getStringFromInputStream(_is);
Log.i("Error != 400", result);
}
if (con.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ con.getResponseCode());
}
BufferedReader responseBuffer = new BufferedReader(new InputStreamReader((con.getInputStream())));
String output;
Log.i("TestbedHttpClient","Output from Server:");
while ((output = responseBuffer.readLine()) != null) {
Log.i("Output",output);
}
con.disconnect();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
响应代码(18936):代码400 libcore.net.http.HttpsURLConnectionImpl $ HttpUrlConnectionDelegate:https://nitos.gr GetErrorStream(18936): libcore.net.http.UnknownLengthHttpInputStream@41eba330 System.err(18936): java.io.FileNotFoundException: https://nitos.gr System.err(18936):at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:186)
答案 0 :(得分:2)
替换以下代码
Log.w("this is connection ",""+con);
InputStream errorstream = con.getErrorStream();
Log.w("GetErrorStream ", ""+errorstream);
InputStream _is;
if (con.getResponseCode() >= 400) {
_is = con.getInputStream();
} else {
_is = con.getErrorStream();
String result = getStringFromInputStream(_is);
Log.i("Error != 400", result);
}
与
InputStream _is;
if (con.getResponseCode() / 100 == 2) { // 2xx code means success
_is = con.getInputStream();
} else {
_is = con.getErrorStream();
String result = getStringFromInputStream(_is);
Log.i("Error != 2xx", result);
}
或者换句话说:当HTTP状态代码大于或等于400时,从getInputStream()
读取是没有意义的。它不是那么简单,也许你必须处理一些3xx代码。看看List of HTTP status codes。
最后一句话:如果您发现HttpURLConnection
使用起来很麻烦,您可以使用列出的here之一的抽象库。
答案 1 :(得分:1)
最后,由于服务器具有身份验证,我无法执行POST请求。 因此,POST请求的配置没有问题。 因此,现在我应该找到一种方法将证书附加到服务器的REST调用。