idaunis/mod_go

Apache module for deploying web applications in Go

MOD_GO

Apache module for deploying web applications in Go

Installation

To install this module compile it and install it into Apache's modules directory by running:

$ make
$ sudo make install

Then activate it in Apache's httpd.conf file as follows:

LoadModule go_module modules/mod_go.so
AddHandler golang .go

Then restart Apache via

$ apachectl restart

Example

The following example takes the content of the URL variable "name" and writes the heading "Hello [name]!" to your browser.

package main

import (
	"io"
	"os"
	"fmt"
	"bytes"
	"net/http"
	"net/url"
	"io/ioutil" )

type voidCloser struct {
	io.Reader
}
func (voidCloser) Close() error { return nil }

func ModGoRequest() (r http.Request) {
	post, _ := ioutil.ReadAll(os.Stdin)
	r.URL, _ = url.ParseRequestURI( "http://"+os.Getenv("HTTP_HOST")+"?"+os.Getenv("QUERY_STRING") )
	r.Method = os.Getenv("REQUEST_METHOD");
	r.Header = map[string][]string{
		"Accept-Encoding": {os.Getenv("HTTP_ACCEPT_ENCODING")},
		"Accept-Language": {os.Getenv("HTTP_ACCEPT_LANGUAGE")},
		"Connection": {os.Getenv("HTTP_CONNECTION")},
		"Content-Type": {os.Getenv("CONTENT_TYPE")},
		"Content-Length": {os.Getenv("CONTENT_LENGTH")} }
	r.Body = voidCloser{bytes.NewBuffer( post ) }
	return r
}

func main() {
	var req http.Request = ModGoRequest()

	fmt.Print("Content-Type: text/html; charset=utf-8\r\n");
	fmt.Print("\r\n");
	fmt.Print("<h1>Hello "+req.FormValue("name")+"!</h1>");
}

Note: To let Go process your GET and POST values. You'll simply need to initialize an http.Request in this way:

type voidCloser struct { io.Reader }
func (voidCloser) Close() error { return nil }
func ModGoRequest() (r http.Request) {
	post, _ := ioutil.ReadAll(os.Stdin)
	r.URL, _ = url.ParseRequestURI( "http://"+os.Getenv("HTTP_HOST")+"?"+os.Getenv("QUERY_STRING") )
	r.Method = os.Getenv("REQUEST_METHOD");
	r.Header = map[string][]string{
		"Accept-Encoding": {os.Getenv("HTTP_ACCEPT_ENCODING")},
		"Accept-Language": {os.Getenv("HTTP_ACCEPT_LANGUAGE")},
		"Connection": {os.Getenv("HTTP_CONNECTION")},
		"Content-Type": {os.Getenv("CONTENT_TYPE")},
		"Content-Length": {os.Getenv("CONTENT_LENGTH")} }
	r.Body = voidCloser{bytes.NewBuffer( post ) }
	return r
}

request := ModGoRequest();

License

MOD_GO is available open-source under the terms of the Apache 2 License.