| Module Name | Latest Version |
|---|---|
| rawhttp-core |  |
| rawhttp-cli |  |
| rawhttp-duplex |  |
| rawhttp-cookies |  |
| rawhttp-req-in-edit |  |
A Java library to make it easy to deal with raw HTTP 1.1, as defined by RFC-7230, and most of HTTP 1.0 (RFC-1945).
For details about using RawHTTP and the motivation for this project, see the blog post I wrote about it!
For testing HTTP servers, check out the blog post I wrote about rawhttp-req-in-edit, which lets you write HTTP files to send requests and assert responses using JS scripts.
For more documentation, visit the website.
HTTP is really simple in 99.9% of cases.
For example, the raw HTTP request you would make to fetch a resource from a web server looks like this:
The example below is taken from the HTTP 1.1 RFC 7230.
GET /hello.txt HTTP/1.1
User-Agent: curl/7.16.3 libcurl/7.16.3 OpenSSL/0.9.7l zlib/1.2.3
Host: www.example.com
Accept-Language: en, mi
To send that request out to a HTTP server using RawHTTP, you can parse the Request and stream it out via a
Socket.
Here's the whole code to do that:
RawHttp rawHttp = new RawHttp();
RawHttpRequest request = rawHttp.parseRequest(
"GET /hello.txt HTTP/1.1\r\n" +
"User-Agent: curl/7.16.3 libcurl/7.16.3 OpenSSL/0.9.7l zlib/1.2.3\r\n" +
"Host: www.example.com\r\n" +
"Accept-Language: en, mi");
Socket socket = new Socket("www.example.com", 80);
request.writeTo(socket.getOutputStream());To read the response, it's just as easy:
RawHttpResponse<?> response = rawHttp.parseResponse(socket.getInputStream());
// call "eagerly()" in order to download the body
System.out.println(response.eagerly());Which prints the complete response:
HTTP/1.1 404 Not Found
Accept-Ranges: bytes
Cache-Control: max-age=604800
Content-Type: text/html
Date: Mon, 04 Dec 2017 21:19:04 GMT
Expires: Mon, 11 Dec 2017 21:19:04 GMT
Last-Modified: Sat, 02 Dec 2017 02:10:22 GMT
Server: ECS (lga/1389)
Vary: Accept-Encoding
X-Cache: 404-HIT
Content-Length: 1270
<!doctype html>
...
A RawHttpResponse, just like a RawHttpRequest can be written to a File's, ServerSocket's
or any other OutpuStream:
try (OutputStream out = Files.newOutputStream(responseFile.toPath())) {
response.writeTo(out);
}That simple!
Notice that just with the above, you have everything you need to send and receive HTTP messages.
To illustrate that, here is a simple implementation of a HTTP server that waits for a single request, then responds with a valid response:
RawHttp http = new RawHttp();
ServerSocket server = new ServerSocket(8083);
new Thread(() -> {
try {
Socket client = server.accept();
RawHttpRequest request = http.parseRequest(client.getInputStream());
if (request.getUri().getPath().equals("/saysomething")) {
http.parseResponse("HTTP/1.1 200 OK\n" +
"Content-Type: text/plain\n" +
"Content-Length: 9\n" +
"\n" +
"something").writeTo(client.getOutputStream());
} else {
http.parseResponse("HTTP/1.1 404 Not Found\n" +
"Content-Type: text/plain\n" +
"Content-Length: 0\n" +
"\n").writeTo(client.getOutputStream());
}
} catch (IOException e) {
e.printStackTrace();
}
}).start();Even though it's quite simple to implement your own HTTP client by using the RawHttp class to parse
requests and responses (which can then be transmitted via Sockets), RawHTTP offers a simple HTTP client definition
(and implementation) that makes it a little bit more convenient to consume HTTP APIs.
Here's the RawHttpClient interface:
public interface RawHttpClient<Response> {
RawHttpResponse<Response> send(RawHttpRequest request) throws IOException;
}The Response type parameter allows implementations to expose their own type for HTTP Responses, if needed.
In the core module, a simple implementation is provided: TcpRawHttpClient.
Example usage:
RawHttpClient<?> client = new TcpRawHttpClient();
EagerHttpResponse<?> response = client.send(request).eagerly();Unless you want to take care of streaming the response body later, always call
eagerly()as shown above to consume the full response body (allowing the connection to be re-used).
Other implementations are available in separate modules:
RawHttpComponentsClient- based on HttpComponents's HttpClient.
Requires the
rawhttp:rawhttp-httpcomponentsmodule.
You can use this if you need support for external specifications, such as cookies (RFC-6265), or basic-auth, for example.
Example usage:
// use a default instance of CloseableHttpClient
RawHttpClient<?> client = new RawHttpComponentsClient();
// or create and configure your own client, then pass it into the constructor
CloseableHttpClient httpClient = HttpClients.createDefault();
RawHttpClient<?> client = new RawHttpComponentsClient(httpClient);RawHTTP also contains a package defining a few types that describe a simple HTTP server.
The main type is the interface RawHttpServer, which uses a Router to route HTTP requests, returning a HTTP response.
Router is a functional interface (i.e. it can be implemented with a Java lambda), so implementing a full
server is very simple.
A default implementation of TcpRawHttpServer is provided... it spans a Thread (but re-uses it when possible) for
each connected client.
Here's an example, written in Kotlin, of how to use RawHttpServer:
val server = TcpRawHttpServer(8093)
server.start { req ->
when (req.uri.path) {
"/hello", "/" ->
when (req.method) {
"GET" ->
http.parseResponse("HTTP/1.1 200 OK\n" +
"Content-Type: text/plain"
).withBody(StringBody("Hello RawHTTP!"))
else ->
http.parseResponse("HTTP/1.1 405 Method Not Allowed\n" +
"Content-Type: text/plain"
).withBody(StringBody("Sorry, can't handle this method"))
}
else ->
http.parseResponse("HTTP/1.1 404 Not Found\n" +
"Content-Type: text/plain"
).withBody(StringBody("Content was not found"))
}
}Several samples showing how to use RawHTTP, including all examples in this page, can be found in the samples project.
Note: to run the samples, execute the tests with the
-Prun-samplesargument.
The rawhttp-duplex module has its own sample, a chat application.
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