Teach how to hash data in mql4 - page 3

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Reshetov:

The problem is that the overheads can be calculated, but you can't see the profit behind them.

I am already profitable and not a bad one, it's all a question of encryption.
 
TheXpert:

First of all, it's not SHA256, it's HMAC SHA512.

it's on BTC-e
 
sanyooooook:
I'm already profiting, and not badly, it's just a question of encryption.

After this message, it's too late to encrypt the profits: the racketeers already know about it and will be stopping by soon. And it doesn't take them long to find it: the house on the outskirts without a roof is where sanyooooook encrypts the profits.

 
Reshetov:

After this message, it's too late to encrypt the profits: the racketeers already know about it and will be stopping by soon. And they don't have to look long: the house on the outskirts without a roof is where sanyooooook encrypts the profits.

"we're not afraid of the grey wolf")
 
sanyooooook:
It's on BTC-e.

Got it. You shouldn't be afraid, by the way. With winapi, by the way, you have to make working code first, then translate it to mql. And to write something in mql that is an independent program... the point?

If you don't want to learn Sharp, you have to learn Python. If you want money, you will have to learn.

 
TheXpert:

Got it. You shouldn't be afraid, by the way. With winapi, by the way, you have to make working code first, then translate it to mql. And to write something in mql that is an independent program... the point?

You don't want to learn Sharp, learn Python. You want dough, you'll have to learn.

shit, look at this:

1. the exchange api, send a post request in json format (json is not difficult)

2. in this query part of the data is hashed, here I have a problem, but it's not a problem. I figured it out (temporarily I have postponed the implementation of the code by a stupid hash of the input data).

3. this thing won't send anything, maybe I'm doing the post wrong?

//+------------------------------------------------------------------+
//|                                                     POSTBTCE.mq4 |
//|                      Copyright © 2012, MetaQuotes Software Corp. |
//|                                        http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2012, MetaQuotes Software Corp."
#property link      "http://www.metaquotes.net"

#include <stdlib.mqh>

#import "wininet.dll"

#define  INTERNET_OPEN_TYPE_DIRECT       0
#define  INTERNET_OPEN_TYPE_PRECONFIG    1
#define  INTERNET_OPEN_TYPE_PROXY        3

// Had to cut the following two defines because of silly MQL4 identifier limits

#define _IGNORE_REDIRECT_TO_HTTP        0x00008000
#define _IGNORE_REDIRECT_TO_HTTPS       0x00004000

#define  INTERNET_FLAG_KEEP_CONNECTION   0x00400000
#define  INTERNET_FLAG_NO_AUTO_REDIRECT  0x00200000
#define  INTERNET_FLAG_NO_COOKIES        0x00080000
#define  INTERNET_FLAG_RELOAD            0x80000000
#define  INTERNET_FLAG_NO_CACHE_WRITE    0x04000000
#define  INTERNET_FLAG_DONT_CACHE        0x04000000
#define  INTERNET_FLAG_PRAGMA_NOCACHE    0x00000100
#define  INTERNET_FLAG_NO_UI             0x00000200

#define  HTTP_ADDREQ_FLAG_ADD            0x20000000
#define  HTTP_ADDREQ_FLAG_REPLACE        0x80000000

#define  INTERNET_SERVICE_HTTP           3
#define  INTERNET_DEFAULT_HTTP_PORT      80

#define  ICU_ESCAPE                      0x80000000
#define  ICU_USERNAME                    0x40000000
#define  ICU_NO_ENCODE                   0x20000000
#define  ICU_DECODE                      0x10000000
#define  ICU_NO_META                     0x08000000
#define  ICU_ENCODE_PERCENT              0x00001000
#define  ICU_ENCODE_SPACES_ONLY          0x04000000
#define  ICU_BROWSER_MODE                0x02000000

#define  AGENT                           "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)"
#define  BUFSIZ                          128

#define  REQUEST_FILE                    "_req.txt"

////////////// PROTOTYPES

bool InternetCanonicalizeUrlA(string lpszUrl, string lpszBuffer, int& lpdwBufferLength[], int dwFlags);

int InternetOpenA(string sAgent, int lAccessType, string sProxyName="", string sProxyBypass="", int lFlags=0);

int InternetOpenUrlA(int hInternetSession, string sUrl, string sHeaders="", int lHeadersLength=0, int lFlags=0,
   int lContext=0);

int InternetReadFile(int hFile, string sBuffer, int lNumBytesToRead, int& lNumberOfBytesRead[]);

int InternetCloseHandle(int hInet);

int InternetConnectA(int handle, string host, int port, string user, string pass, int service, int flags, int context);

bool HttpSendRequestA(int handle, string headers, int headersLen, int& optional[], int optionalLen);

bool HttpAddRequestHeadersA(int handle, string headers, int headersLen, int modifiers);

int HttpOpenRequestA(int hConnect, string lpszVerb, string lpszObjectName, string lpszVersion,
 string lpszReferer, string& lplpszAcceptTypes[], int dwFlags, int dwContext);

#import

//////// CODE

bool HttpGET(string strUrl, string& strWebPage)
{
  int hSession = InternetOpenA(AGENT, INTERNET_OPEN_TYPE_DIRECT, "0", "0", 0);

  int hReq = InternetOpenUrlA(hSession, strUrl, "0", 0,
        INTERNET_FLAG_NO_CACHE_WRITE |
        INTERNET_FLAG_PRAGMA_NOCACHE |
        INTERNET_FLAG_RELOAD, 0);

  if (hReq == 0) {
    return(false);
  }

  int     lReturn[]  = {1};
  string  sBuffer    = "";

  while (TRUE) {
    if (InternetReadFile(hReq, sBuffer, BUFSIZ, lReturn) <= 0 || lReturn[0] == 0) {
      break;
    }
    strWebPage = StringConcatenate(strWebPage, StringSubstr(sBuffer, 0, lReturn[0]));
  }

  InternetCloseHandle(hReq);
  InternetCloseHandle(hSession);

  return (true);
}

/////////// POST

bool HttpPOST(string host, string script, string params[][], string filenames[][], string& strWebPage)
{
  int hIntrn = InternetOpenA(AGENT, INTERNET_OPEN_TYPE_DIRECT, "0", "0", 0);
  if (hIntrn == 0) {
    return (false);
  }

  int hConn = InternetConnectA(hIntrn,
                              host,
                              INTERNET_DEFAULT_HTTP_PORT,
                              NULL,
                              NULL,
                              INTERNET_SERVICE_HTTP,
                              0,
                              NULL);

  if (hConn == 0) {
    return (false);
  }

  int dwOpenRequestFlags =   // _IGNORE_REDIRECT_TO_HTTP |
                             // _IGNORE_REDIRECT_TO_HTTPS |
                             // INTERNET_FLAG_KEEP_CONNECTION |
                             // INTERNET_FLAG_NO_AUTO_REDIRECT |
                             // INTERNET_FLAG_NO_COOKIES |
                             // INTERNET_FLAG_NO_CACHE_WRITE |
                             INTERNET_FLAG_NO_UI |
                             INTERNET_FLAG_RELOAD;

  string accept[] = {"Accept: text/*\r\n"};

  int hReq = HttpOpenRequestA(hConn,
                             "POST",
                             script,
                             "HTTP/1.0",
                             NULL,
                             accept,
                             dwOpenRequestFlags,
                             NULL);

  string strBoundary = "---------------------------HOFSTADTER";
  string strContentHeader = "Content-Type: multipart/form-data; boundary=" + strBoundary;

  HttpAddRequestHeadersA(hReq, strContentHeader, StringLen(strContentHeader), HTTP_ADDREQ_FLAG_REPLACE);

  int i     = 0,
      idx   = 0,
      r     = 0,
      len   = 0
  ;

  string hdr = "";

  int _req = FileOpen(REQUEST_FILE, FILE_BIN|FILE_WRITE);
  if(_req <= 0) {
    return (false);
  }

  // Add parameters to request body

  for (i = ArrayRange(params, 0) - 1; i >= 0; i--) {
    hdr = StringConcatenate(
      "--", strBoundary, "\r\n",
      "Content-Disposition: form-data; name=\"", params[i][0], "\"\r\n\r\n",
      params[i][1], "\r\n");
    FileWriteString(_req, hdr, StringLen(hdr));
  }

  // Add files to request body
  
  for (i = ArrayRange(filenames, 0) - 1; i >= 0; i--) {
    hdr = StringConcatenate(
      "--", strBoundary, "\r\n",
      "Content-Disposition: form-data; name=\"", filenames[i][0], "\"; filename=\"", filenames[i][1], "\"\r\n",
      "Content-Type: application/octet-stream\r\n\r\n");

    FileWriteString(_req, hdr, StringLen(hdr));

    int handle = FileOpen(filenames[i][1], FILE_BIN|FILE_READ);
    if(handle <= 0) {
      return (false);
    }
    len = FileSize(handle);
    for (int b = 0; b < len; b++) {
      FileWriteInteger(_req, FileReadInteger(handle, CHAR_VALUE), CHAR_VALUE);
    }
    FileClose(handle);
  }

  string boundaryEnd = "\r\n--" + strBoundary + "--\r\n";
  FileWriteString(_req, boundaryEnd, StringLen(boundaryEnd));

  FileClose(_req);

  // Re-reads saved POST data byte-to-byte from file in the pseudo-character array
  //  we need to send with HttpSendRequestA. This is due to the fact I know no clean
  //  way to cast strings _plus_ binary file contents to a character array in MQL.
  //  If you know how to do it properly feel free to contact me.

  int request[];

  _req = FileOpen(REQUEST_FILE, FILE_BIN|FILE_READ);
  if (_req <= 0) {
    return (false);
  }
  len = FileSize(_req);

  ArrayResize(request, len);
  ArrayInitialize(request, 0);

  for (i = 0; i < len; i++) {
    request[r] |= FileReadInteger(_req, CHAR_VALUE) << (idx * 8);
    idx = (idx + 1) %4;
    if (idx == 0) {
      r++;
    }
  }
  FileClose(_req);

  if (!HttpSendRequestA(hReq, NULL, 0, request, len)) {
    return (false);
  }

  // Read response

  int     lReturn[]  = {1};
  string  sBuffer    = "";

  while (TRUE) {
    if (InternetReadFile(hReq, sBuffer, BUFSIZ, lReturn) <= 0 || lReturn[0] == 0) {
      break;
    }
    strWebPage = StringConcatenate(strWebPage, StringSubstr(sBuffer, 0, lReturn[0]));
  }

  InternetCloseHandle(hReq);
  InternetCloseHandle(hConn);
  InternetCloseHandle(hIntrn);

  return (true);
}


//+------------------------------------------------------------------+
//| script program start function                                    |
//+------------------------------------------------------------------+
int start()
  {
//----
string params[2][2];

params[0][0] = "key1";

params[0][1] = "value1";
params[1][0] = "key2";

params[1][1] = "value2";
// for multiple file upload

string filenames[2][2];
filenames[0][0] = "uploaded1"; // name of form field for file upload

filenames[0][1] = "test1.txt"; // file name in experts/files/ subfolder
filenames[1][0] = "uploaded2";
filenames[1][1] = "test2.txt";

string response;
string Signature="DZeZIy/6H6fXGPEk8sdfgYJOYl0gGIlfivZqcfjbIzKk=";
string s="{"+CharToStr(34)+"Login"+CharToStr(34)+":"+CharToStr(34)+"B8yQVM4tGWijT"+CharToStr(34)+","
            +CharToStr(34)+"Wmid"+CharToStr(34)+":"+CharToStr(34)+""+CharToStr(34)+","
            +CharToStr(34)+"Culture"+CharToStr(34)+":"+CharToStr(34)+"ru-RU"+CharToStr(34)+","
            +CharToStr(34)+"Signature"+CharToStr(34)+":"+CharToStr(34)+Signature+CharToStr(34)+"}";Print(s);
HttpPOST("https://secure.indx.ru/api/v1/tradejson.asmx", s, params, filenames, response);

Print(response);
//----
   return(0);
  }
//+------------------------------------------------------------------+
 

as soon as you can send a request, you're ready with a set of trading functions

sunflower seeds but it won't return anything to me ((!

the string goes correctly on request but i must be using the wrong POST function

 
sanyooooook:
So I say write it in any normal language and figure out where the problem is and then translate it into MQL.
 

sanyooooook:

3. this infestation doesn't want to send anything, maybe I'm doing the post wrong?

...
string response;
string Signature="DZeZIy/6H6fXGPEk8sdfgYJOYl0gGIlfivZqcfjbIzKk=";
string s="{"+CharToStr(34)+"Login"+CharToStr(34)+":"+CharToStr(34)+"B8yQVM4tGWijT"+CharToStr(34)+","
            +CharToStr(34)+"Wmid"+CharToStr(34)+":"+CharToStr(34)+"364823817435"+CharToStr(34)+","
            +CharToStr(34)+"Culture"+CharToStr(34)+":"+CharToStr(34)+"ru-RU"+CharToStr(34)+","
            +CharToStr(34)+"Signature"+CharToStr(34)+":"+CharToStr(34)+Signature+CharToStr(34)+"}";Print(s);
HttpPOST("https://secure.indx.ru/api/v1/tradejson.asmx", s, params, filenames, response);
...

Actually, in both GET and POST requests everything is passed in the form: id=value, i.e. parameter name and value with an equal sign. Plus all the characters that are not Latin letters and numbers are coded with % (character code).

I.e. if we assume that array params stores identifiers of passed parameters, then surely variable s should also be an array of the same size to pass values corresponding to parameters?

 
Reshetov:


I.e. if we assume that the params array stores the identifiers of the parameters to be passed, then surely the s variable must also be an array of the same size to pass the values corresponding to the parameters?

are you asking me?

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