在Netty中发送HTTP发布请求

Question

I'm trying to wrap my mind around how I would go about constructing an HTTP Post request for a web server.

I found this code

HttpRequest httpReq=new DefaultHttpRequest(HttpVersion.HTTP_1_1,HttpMethod.POST,uri);
httpReq.setHeader(HttpHeaders.Names.HOST,host);
httpReq.setHeader(HttpHeaders.Names.CONNECTION,HttpHeaders.Values.KEEP_ALIVE);
httpReq.setHeader(HttpHeaders.Names.ACCEPT_ENCODING,HttpHeaders.Values.GZIP);
String params="a=b&c=d";
ChannelBuffer cb=ChannelBuffers.copiedBuffer(params,Charset.defaultCharset());
httpReq.setHeader(HttpHeaders.Names.CONTENT_LENGTH,cb.readableBytes());
httpReq.setContent(cb);

From what I can deduce, it appears that this request will send a POST request with two values, a and c, which are equal to b and d, respectively.

What I'd like to be able to do is submit a JSON request. For example, if my post-data needed to be

{
    "test": "value",
    "key": "value",
}

would I just replace the a=b&c=d with that string itself? Also, I must have the content-type set to application/json.

If anyone could help me or point me in the right direction, I would really appreciate it.

Answer 1

My example for JSON requests via Netty 4.x to localhost/target :

String JSON_DATA = "{    \"test\": \"value\",    \"key\": \"value\"}";
FullHttpRequest request = new DefaultFullHttpRequest(HTTP_1_1, POST, "/target",
        wrappedBuffer(JSON_DATA.getBytes(CharsetUtil.UTF_8)));
request.headers().add(HttpHeaderNames.HOST, "127.0.0.1");
request.headers().add(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.APPLICATION_JSON);
request.headers().add(HttpHeaderNames.ACCEPT_ENCODING, HttpHeaderValues.GZIP);
request.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.CLOSE);

outboundChannel.writeAndFlush(request);