README.md

enginx Document

Cocoapods:

npm:

maven:

version: 2.0
config file format: enginx DSL
platform: Android, iOS, Node.js

if you want 1.0 version document, please checkout branch "1.0".

installation

iOS via Cocoapods

pod 'enginx', '~> 2.0'

Android

compile 'cc.stephenw.enginxandroid:enginxandroid:2.0.1'

Node.js

npm install -s [email protected]

Getting Start

write a config file

for example, you want to rewrite https://google.com/user/9527 to google://user?id=9527, here is the config file(string):

server {
  domain: "google.com";
  scheme: "https";
  port: "443";
  location "/user" {
    match $path "^/user/(.*)$";
    # $1 is the variable of "9527"
    return "google://user?id=$1";
  }
}

load the config & do rewrite

• for iOS

char* config = ...;
enginx_load_config_string(config);

enginx_compile_error* error = enginx_get_current_error();
if (error != NULL) {
//handle error
}

//rewrite
char* url = ...;
char* rewrited_url_string = enginx_rewrite_url(url);

//manage memory
enginx_compile_error_release(&error);
free(rewrited_url_string);

• for Android

String config = ...; //load config from network, file, etc..
String errorMessage = EnginxAndroid.loadConfig(config);
if (!errorMessage.isEmpty()) {
	//handle error
}
//then use it
String url = EnginxAndroid.rewriteURL(...);

• for Node.js (server side)

const enginx = require('enginx-nodejs')

//you can catch config error here
enginx.loadConfig('...')

//then use it
enginx.rewriteURLString('...')

enginx concepts

• server
• location
• instruction
  • encode/decode
  • match
  • parse
  • var
  • return
  • greater/smaller/equal
• variable
• string template

server

server stands for a host that can response the url

fields:

• domain: required, url domain name
• scheme: required, url request protocol
• port: required, 80 for http, 443 for https

location

location is a scope contains instructions for matched path.
matching rules: regex string.

instruction

• encode/decode
  encode/decode [variable]
  do url encode/decode with global or interal variables.

• match
  match [variable] [regex string]
  use regex string to extract variables from variables, $0 is the full match, match groups are stored with name $n, n stands for the n-th one.

• parse
  parse [variable]
  parse variable in query param format, such as the $fragment is string foo=bar, parse $fragment will store $#foo as key, bar as the value in temp variable.

• var
  var [variable name] [string template]
var defines variable from string template, then you can access this variable with $variable_name.

variable

enginx has some pre-defined variables:

• $scheme
• $host
• $request_uri
• $path
• $fragment
• $query_string
• query parameters: use as $arg_key (substitue ‘key’ yourself)

alse you can define variable with specific name, then use it as $variable_name

string template

string template is very important in enginx, which generates variable content and represents final result. Basically, you can use variables in string template, for example:

//sample url
http://sample.com?userid=9527#token=qwerty

//instructions for this url 
parse $fragment;
var timestamp 2017-4-1;

//string template
https://google.com/user/$arg_userid?token=$#token&timpstamp=$timestamp

this string template uses variable from query arguments, parsed variables, and defined variables.