The getRequestBody method of the HttpExchange object returns an InputStream. There is still much work for correctly read the "Body". Is it a Java library + object + method that goes one more step ahead and returns the body (at the server side) as a ready-to-use Java String?
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5 Answers
InputStreamReader isr = new InputStreamReader(t.getRequestBody(),"utf-8");
BufferedReader br = new BufferedReader(isr);
// From now on, the right way of moving from bytes to utf-8 characters:
int b;
StringBuilder buf = new StringBuilder(512);
while ((b = br.read()) != -1) {
buf.append((char) b);
}
br.close();
isr.close();
// The resulting string is: buf.toString()
// and the number of BYTES (not utf-8 characters) from the body is: buf.length()
3 Comments
Joshua
StringBuilder buf = new StringBuilder();
Shreyas SG
what is 't' here? InputStreamReader(t.getRequestBody(),"utf-8");
A13X
The HttpExchange object. Probably taken from another SO example where they shorten it to t.
If you are using Spring MVC, you can use the @RequestBody annotation on a method parameter which is of type String. For example.
@RequestMapping(value = "/something", method = RequestMethod.POST)
public void doSomething(@RequestBody String requestBodyString) {
// does something..
}
Comments
You can use Commons IO's org.apache.commons.io.IOUtils.toString(InputStream, String) to do this in one line. (It might not work with HTTP keep-alive though)
Edit:
If you want to go straight to JSON, there are a bunch of Web Service stacks that will do the unmarshalling for you. Try
CXF / JAX-RS: http://cxf.apache.org/docs/jax-rs-data-bindings.html#JAX-RSDataBindings-JSONsupport
Did you try this ?
InputStreamReader isr = new InputStreamReader(exchange.getRequestBody(),"utf-8");
BufferedReader br = new BufferedReader(isr);
String value = br.readLine();
2 Comments
Joshua
Yes, I tried. The problem is that the body does not end with CR/LF. I found a solution by using the read(char[]) method with the content-length and it approximately works. I wonder if it is not a method that performs this reading job to the end.
artbristol
You should get the encoding from the HTTP headers, not just assume it's UTF-8.
In HttpHandler:
InputStreamReader isr = new InputStreamReader(he.getRequestBody(), "utf-8");
BufferedReader br = new BufferedReader(isr);
int b;
StringBuilder buf = new StringBuilder();
while ((b = br.read()) != -1) {
buf.append((char) b);
}
br.close();
isr.close();
System.out.println(buf.toString());
Comments
