How would I read the HTTP Request parameters if I send an HTTP Request from a Java Servlet and receive it on a TCP port using ServerSocket. Can anyone please help me on this?
Following is my design
Servlet
GET/POST using HttpURLConnection
URL url = new URL("http://localhost:2309/");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestProperty("Content-Type", "application/text");
connection.setRequestProperty("Accept", "application/text");
connection.setRequestMethod("POST");
connection.setRequestProperty("header1", "value1");
at localhost : 2309 I have a ServerSocket up and listening for a request from above servlet. I am trying to read the request but I only read the HTTP Headers, but I do not see the request parameters (I know in above example I am not sending any parameters, I had tried this by getting Output stream of the connection and writing to it).
this is how I tried sending request parameters to my ServerSocket program.
byte[] parameters = someString.getBytes();
OutputStream outStream = connection.getOutputStream();
outStream.write(parameters);
Following is my ServerSocket program.
public static void main(String... args) {
int port = 2309;
ServerSocket sSocket = new sSocket(port);
System.out.println("### SERVER IS UP AND RUNNING, WAITING FOR A CLIENT TO CONNECT ON " + port + " ###");
Socket cSocket = sSocket.accept();
System.out.println("### CONNECTION WITH THE CLIENT CREATED ###");
BufferedReader readRequest = new BufferedReader(new InputStreamReader(cSocket.getInputStream()));
PrintWriter writeResponse = new PrintWriter(cSocket.getOutputStream());
String line = "";
while (readRequest != null && (line = readRequest.readLine()) != null) {
if (line.length() == 0)
break;
System.out.println(line);
}
writeResponse.write("HTTP/1.0 200 OK\r\n");
writeResponse.write("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
writeResponse.write("Server: Apache/0.8.4\r\n");
writeResponse.write("Content-Type: text/html\r\n");
writeResponse.write("Content-Length: 59\r\n");
writeResponse.write("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
writeResponse.write("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
writeResponse.write("\r\n");
writeResponse.write("<TITLE>Example</TITLE>");
writeResponse.write("<P>This is an example</P>");
}
Following is what I see on my ServerSocket program OUTPUT.
### SERVER IS UP AND RUNNING, WAITING FOR A CLIENT TO CONNECT ON 2309 ###
### CONNECTION WITH THE CLIENT CREATED ###
POST / HTTP/1.1
Content-Type: application/text
Accept: application/text
header1: value1
Cache-Control: no-cache
Pragma: no-cache
User-Agent: Java/1.7.0_75
Host: localhost:2309
Connection: keep-alive
### CONNECTION WITH THE CLIENT TERMINATED ###
Can anyone suggest me
how do I read the Request Parameters
Writing to output stream on connection object, will it get me the request parameters right at the place?
Is this a good approach, when I just want to keep an standalone server up, which will be just listening to the requests coming on to single port and serving it [OR] there is any better way through which I can perform this?
I was not able to get the body from HTTP Payload. And probable reason was below line.
BufferedReader readRequest = new BufferedReader(new InputStreamReader(cSocket.getInputStream()));
I changed it to
public static void main(String... args) {
int port = 2309;
sSocket sSocket = new sSocket(port);
System.out.println("### SERVER IS UP AND RUNNING, WAITING FOR A CLIENT TO CONNECT ON " + port + " ###");
Socket cSocket = sSocket.accept();
System.out.println("### CONNECTION WITH THE CLIENT CREATED ###");
InputStream readRequest = cSocket.getInputStream();
PrintWriter writeResponse = new PrintWriter(cSocket.getOutputStream());
byte[] buf = new byte[4096];
readRequest.read(buf);
String httpPayload = new String(buf, "UTF-8");
HttpPayload httpPayloadObject = new HttpPayload(httpPayload);
Map<String, Object> httpParameters = httpPayloadObject.getHttpPayloadBodyMap();
PushNotificationEvent event = new PushNotificationEvent(httpParameters);
event.processEvent();
writeResponse.write("HTTP/1.0 200 OK\r\n");
writeResponse.write("Date: Fri, 31 Dec 1999 23:59:59 GMT\r\n");
writeResponse.write("Server: Apache/0.8.4\r\n");
writeResponse.write("Content-Type: text/html\r\n");
writeResponse.write("Content-Length: 59\r\n");
writeResponse.write("Expires: Sat, 01 Jan 2000 00:59:59 GMT\r\n");
writeResponse.write("Last-modified: Fri, 09 Aug 1996 14:21:40 GMT\r\n");
writeResponse.write("\r\n");
writeResponse.write("<TITLE>Example</TITLE>");
writeResponse.write("<P>This is an example</P>");
}
the Buffered input stream omitted the body part. Now I get the output as desired
POST / HTTP/1.1
Host: 127.0.0.1:2309
Connection: keep-alive
Content-Length: 63
Origin: chrome-extension://hgmloofddffdnphfgcellkdfbfbjeloo
header1: value1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW6**strong text**4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36
Content-Type: application/json
Accept: */*
Accept-Encoding: gzip, deflate
en-US,en;q=0.8
{jsondata : {key1:value1_getting_bigger_content, key2:value2}}
the part which was not showing up in the payload previously is
{jsondata : {key1:value1_getting_bigger_content, key2:value2}}
I am still not sure why BufferedReader or BufferedInputStream omits the body