Golang wrote a proxy program to help debugging, and PHP implemented a class for output debugging.

1. Sometimes, we want to see the changes in the debugging information output for the same URL request multiple times. 2. When the script you debug needs to be redirected to another script and then redirected back, you want to see the debugging output information of the script. 3. When your script requests a self-designed API through CURL, you want to output some debugging information about this API. That

1. Sometimes, we want to see the changes in the debugging information output for the same URL request multiple times. 2. When the script you debug needs to be redirected to another script and then redirected back, you want to see the debugging output information of the script. 3. When your script requests a self-designed API through CURL, you want to output some debugging information about this API. That

1. Sometimes, we want to see the changes in the debugging information output for the same URL request multiple times.
2. When the script you debug needs to be redirected to another script and then redirected back, you want to see the debugging output information of the script.
3. When your script requests a self-designed API through CURL, you want to output some debugging information about this API.

This agent will be able to help you, but now it can only output some debugging information, it still needs to be improved.
Introduction: https://github.com/yangxikun/proxy-debug/blob/master/README_zh-CN.md
Currently, only linux is supported, because the shell Character Color function is used. <无>

Source code and demo:Source code

   * @copyright 2014 kun * @license   http://www.php.net/license/3_01.txt  PHP License 3.01 * @version   1.0 * @link      https://github.com/yangxikun/tag-parse * @since     1.0 *//*** PD** @author    rokety 
  
   * @license   http://www.php.net/license/3_01.txt  PHP License 3.01* @version   1.0* @link* @since     1.0*/class PD{    protected static $debugItemCount = 0;    protected static $debugGroupCount = 0;    protected static $group = array();    protected static $start;    protected static $offset = 0;    protected static $varNameString = null;    /**     * getVarName     * get the variable name     *     * @access protected     * @static     *     * @return string     */    protected static function getVarName()    {        if (self::$varNameString === null) {            $trace = debug_backtrace();            $line = file($trace[3]['file']);            self::$varNameString = $line[$trace[3]['line']-1];        }        preg_match(            '~\$([\w\d_]+)~',            self::$varNameString,            $matches,            PREG_OFFSET_CAPTURE,            self::$offset        );        if (!isset($matches[1])) {            throw new Exception('Error Params, should use $variable as params', 1);        }        self::$offset = $matches[1][1];        return $matches[1][0];    }    /**     * func     *     * @param string $type debug type(info, warn, error)     * @param mixed  $arg  debug variable     *     * @access protected     * @static     *     * @return null     */    protected static function func($type, $arg)    {        if (self::$start) {            self::$group[] = array(                "category"=>$type,                "type"=>gettype($arg),                "name"=>self::getVarName(),                "value"=>$arg            );        } else {            self::$debugItemCount++;            header(                'Proxy_debug_item_'.self::$debugItemCount.': '                .json_encode(                    ["category"=>$type,                    "type"=>gettype($arg),                    "name"=>self::getVarName(),                    "value"=>$arg]                )            );            header('Proxy_debug_item_count: '.self::$debugItemCount);        }    }    public static function __callStatic($name, $args)    {        $func = ['info'=>'I', 'warn'=>'W', 'error'=>'E'];        if (isset($func[$name])) {            self::$offset = 0;            self::$varNameString = null;            foreach ($args as $key => $arg) {                self::func($func[$name], $arg);            }        } else {            throw new Exception('Call to undefined method!', 1);        }    }    /**     * groupStart     * start record a group     *     * @access public     * @static     *     * @return null     */    public static function groupStart()    {        self::$start = true;        self::$debugGroupCount++;    }    /**     * groupEnd     * stop record a group     *     * @access public     * @static     *     * @return null     */    public static function groupEnd()    {        self::$start = false;        header(            'Proxy_debug_group_'            .self::$debugGroupCount            .': '.json_encode(self::$group)        );        header('Proxy_debug_group_count: '.self::$debugGroupCount);        self::$group = array();    }}
  

//Proxy Debug//This simple program is for helping developers debug through http header.//For more detail, see README.mdpackage mainimport ("bufio""encoding/json""fmt""io/ioutil""log""net/http""os""strconv""strings")//color configvar color map[string]interface{}//Parse config filefunc readConfig() {config, err := os.Open("config.ini")if err != nil {log.Fatalln(err)}buf := bufio.NewReader(config)line, _ := buf.ReadString('\n')var jsonData interface{}err = json.Unmarshal([]byte(line), &jsonData)if err != nil {log.Fatalln(err)}var ok boolcolor, ok = jsonData.(map[string]interface{})if ok == false {log.Fatalln("Parse config file error, it must be a json string!")}for _, c := range color {if c.(float64) > 37 || c.(float64) < 30 {log.Fatalln("Config error!The valid value is 30-37.")}}item := [5]string{"url", "varName", "varType", "varValue", "group"}for _, i := range item {_, has := color[i]if has == false {log.Fatalln("Losing configuration:", i)}}}func main() {var port int = 8888if len(os.Args) == 1 {fmt.Println("Listening in default port:8888")} else if os.Args[1] == "--help" {fmt.Println("usage: proxy [-p port]")return} else if len(os.Args) != 3 || os.Args[1] != "-p" {log.Fatalln("Error arguments!Just support '-p port'.")} else {port, err := strconv.Atoi(os.Args[2])if err != nil && port > 65535 || port < 1024 {log.Fatalln("Error port, it should be 1024-65535, default is 8888.")}}readConfig()http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {r.RequestURI = ""resp, err := http.DefaultClient.Do(r)if err != nil {http.NotFound(w, r)return}defer resp.Body.Close()//Get the debugging information form http headercaterory := map[string]int{"I": 34, "W": 33, "E": 31}format := "\t \033[%dm-%s\033[%vm %s\033[%vm%s\033[%vm%s\n"debugItem := make(map[string]map[string]interface{})debugItemIndex := make([]string, 0, 5)var jsonData interface{}v, okDebugItem := resp.Header["Proxy_debug_item_count"]if okDebugItem {count, _ := strconv.Atoi(v[0])for i := 1; i <= count; i++ {index := "Proxy_debug_item_" + strconv.Itoa(i)vv, ok := resp.Header[index]if ok {err = json.Unmarshal([]byte(vv[0]), &jsonData)if err != nil {continue}data, ok := jsonData.(map[string]interface{})if ok == false {continue}debugItemIndex = append(debugItemIndex, index)debugItem[index] = data}}}debugGroup := make(map[string]interface{})debugGroupIndex := make([]string, 0, 5)v, okDebugGroup := resp.Header["Proxy_debug_group_count"]if okDebugGroup {count, _ := strconv.Atoi(v[0])for i := 1; i <= count; i++ {index := "Proxy_debug_group_" + strconv.Itoa(i)vv, ok := resp.Header[index]if ok {err = json.Unmarshal([]byte(vv[0]), &jsonData)if err != nil {continue}debugGroup[index] = jsonDatadebugGroupIndex = append(debugGroupIndex, index)}}}//response to browserfor k, v := range resp.Header {for _, vv := range v {w.Header().Add(k, vv)}}for _, c := range resp.Cookies() {w.Header().Add("Set-Cookie", c.Raw)}w.WriteHeader(resp.StatusCode)result, err := ioutil.ReadAll(resp.Body)if err != nil {http.NotFound(w, r)return}w.Write(result)//output debugging informationif okDebugItem {fmt.Printf("\033[%vm%v\n", color["url"], r.URL)var maxLenName, maxLenType int = 0, 0for _, vm := range debugItem {v := vm["name"].(string)if len(v) > maxLenName {maxLenName = len(v)}v = vm["type"].(string)if len(v) > maxLenType {maxLenType = len(v)}}for _, i := range debugItemIndex {n := debugItem[i]["name"].(string)t := debugItem[i]["type"].(string)c := debugItem[i]["category"].(string)fmt.Printf(format,caterory[c],c,color["varName"],n+strings.Repeat(" ", maxLenName-len(n)+1),color["varType"],t+strings.Repeat(" ", maxLenType-len(t)+1),color["varValue"],strings.Replace(fmt.Sprint(debugItem[i]["value"]), "map", "", 1))}}if okDebugGroup {if okDebugItem == false {fmt.Printf("\033[%vm%v\n", color["url"], r.URL)}maxLenName := make([]int, len(debugGroupIndex))maxLenType := make([]int, len(debugGroupIndex))k := 0for _, vm := range debugGroup {for _, vv := range vm.([]interface{}) {vk, ok := vv.(map[string]interface{})if ok == false {continue}v := vk["name"].(string)if len(v) > maxLenName[k] {maxLenName[k] = len(v)}v = vk["type"].(string)if len(v) > maxLenType[k] {maxLenType[k] = len(v)}}k++}k = 0for _, i := range debugGroupIndex {fmt.Printf("\t\033[%vm=Group %v=\n", color["group"], k+1)for _, v := range debugGroup[i].([]interface{}) {vk, ok := v.(map[string]interface{})if ok == false {continue}n := vk["name"].(string)t := vk["type"].(string)c := vk["category"].(string)fmt.Printf(format,caterory[c],c,color["varName"],n+strings.Repeat(" ", maxLenName[k]-len(n)+1),color["varType"],t+strings.Repeat(" ", maxLenType[k]-len(t)+1),color["varValue"],strings.Replace(fmt.Sprint(vk["value"]), "map", "", 1))}k++fmt.Printf("\t\033[%vm=GROUP=\n", color["group"])}}})http.ListenAndServe(":"+strconv.Itoa(port), nil)}