I am trying to implement the following PHP code in Google App Engine Go:
<?php
function api_query(array $req = array()) {
$key = '90294318da0162b082c3d27126be80c3873955f9';
$req['method'] = 'getinfo';
$req['nonce'] = 1394503747386411;
// generate the POST data string
$post_data = http_build_query($req, '', '&');
$sign = '75da1e3ff750286bf73d03197f1b779fbfff963fd7402941ae326509a6615eacb839b44f236b4d5ee6cff39321e7b35e9563a9a2075e99df0f4ee3b732999348';
// generate the extra headers
$headers = array(
'Sign: '.$sign,
'Key: '.$key,
);
// our curl handle (initialize if required)
static $ch = null;
if (is_null($ch)) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; Cryptsy API PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
}
curl_setopt($ch, CURLOPT_URL, 'https://api.cryptsy.com/api');
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
// run the query
$res = curl_exec($ch);
if ($res === false) throw new Exception('Could not get reply: '.curl_error($ch));
$dec = json_decode($res, true);
if (!$dec) throw new Exception('Invalid data received, please make sure connection is working and requested API exists');
echo "<pre>".print_r($dec, true)."</pre>";
return $dec;
}
api_query();
When executed, the code returns a JSON array of values. I tried implementing the same code in Golang:
func PrivateCall(c appengine.Context) (map[string]interface{}, error) {
AuthAPI := "https://api.cryptsy.com/api"
APIKey := "90294318da0162b082c3d27126be80c3873955f9"
tr := urlfetch.Transport{Context: c}
values := url.Values{}
values.Set("method", "getinfo")
values.Set("nonce", "1394503747386411")
signature := "75da1e3ff750286bf73d03197f1b779fbfff963fd7402941ae326509a6615eacb839b44f236b4d5ee6cff39321e7b35e9563a9a2075e99df0f4ee3b732999348"
req, err := http.NewRequest("POST", AuthAPI+"?"+values.Encode(), nil)
if err != nil {
c.Infof("API - Call - error 2 - %s", err.Error())
return nil, err
}
req.Header.Set("Key", APIKey)
req.Header.Set("Sign", signature)
c.Infof("req - %v", req)
resp, err := tr.RoundTrip(req)
if err != nil {
c.Errorf("API post error: %s", err)
return nil, err
}
defer resp.Body.Close()
//reading response
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
c.Errorf("API read error: could not read body: %s", err)
return nil, err
}
result := make(map[string]interface{})
//unmarshalling JSON response
err = json.Unmarshal(body, &result)
if err != nil {
c.Infof("Unmarshal: %v", err)
c.Infof("%s", body)
return nil, err
}
return result, nil
}
I am getting an error saying "Unable to Authorize Request - Check Your Post Data". Does anyone see what could've caused this error? At the moment my best guess is that perhaps the request header in Go is a map[string][]string, while in PHP it appears to be an array...
As suggested by LeGEC, you're putting the POST data onto the end of the URL as if it were a GET request.
Try replacing
values := url.Values{}
values.Set("method", "getinfo")
values.Set("nonce", "1394503747386411")
signature := "75da1e3ff750286bf73d03197f1b779fbfff963fd7402941ae326509a6615eacb839b44f236b4d5ee6cff39321e7b35e9563a9a2075e99df0f4ee3b732999348"
req, err := http.NewRequest("POST", AuthAPI+"?"+values.Encode(), nil)
with
data := struct {
method string
nonce string
}{
"getinfo",
"1394503747386411",
}
signature := "75da1e3ff750286bf73d03197f1b779fbfff963fd7402941ae326509a6615eacb839b44f236b4d5ee6cff39321e7b35e9563a9a2075e99df0f4ee3b732999348"
postData, err := json.Marshal(data)
if err != nil {
return nil, err
}
buf := bytes.NewBuffer(postData)
req, err := http.Post(AuthAPI, "application/json", buf)
Here is what you need and here are the few things you missed.
https you need to set the TLSClientConfigX- prefix in custom headersvalues.Encode() is the the wrong position.Example: See https://www.cryptsy.com/pages/api
var (
urlStr = "https://api.cryptsy.com/api"
key = "YOUR KEY"
secret = "YOUR SECRECT"
agent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36"
)
func main() {
client := &http.Client{Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}}
values := url.Values{}
// $req['method'] = $method;
values.Set("method", "getinfo")
// $mt = explode(' ', microtime());
// $req['nonce'] = $mt[1];
values.Set("nonce", time.Nanosecond.String())
// $post_data = http_build_query($req, '', '&');
encoded := values.Encode()
mac := hmac.New(sha512.New, []byte(secret))
mac.Write([]byte(encoded))
//$sign = hash_hmac("sha512", $post_data, $secret);
sign := fmt.Sprintf("%x", mac.Sum(nil))
req, err := http.NewRequest("POST", urlStr, bytes.NewBufferString(encoded))
if err != nil {
log.Fatalln(err)
}
// generate the extra headers
// $headers = array(
// 'Sign: '.$sign,
// 'Key: '.$key,
// );
req.Header.Set("X-Sign", sign)
req.Header.Set("X-Key", key)
// curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/4.0 (compatible; Cryptsy API PHP client; '.php_uname('s').'; PHP/'.phpversion().')');
req.Header.Set("User-Agent", agent)
req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
req.Header.Add("Content-Length", strconv.Itoa(len(encoded)))
// $res = curl_exec($ch);
resp, err := client.Do(req)
if err != nil {
log.Fatalln(err)
}
fmt.Println(resp.Status)
data, _ := ioutil.ReadAll(resp.Body)
fmt.Printf("%s", data)
}