PHP入门(5) C++和PHP二进制传输

来源：互联网发布：linux cp复制文件夹编辑：程序博客网时间：2024/06/05 19:00

C++需要实现PHP端的:

bin2Hex

函数,PHP通过这种类型的字符串调用:

pack

转换成PHP能识别的2进制数据。

C++需要做的是实现一个bin2hex,其实只是把c++读取的2进制数据当成byte数组,把每一位转换成16进制字符串就可以了。Qt中使用sprintf无法限制2位长度,因此sprintf之后判断长度为8则截取最后3个字符串，包含了/0终止符

#ifndef PHPCLASS_H#define PHPCLASS_H#include <QObject>class PhpClass : public QObject{    Q_OBJECTpublic:    explicit PhpClass(QObject *parent = 0);    //字节流转换为十六进制字符串的另一种实现方式    void Bin2Hex( const char *sSrc,QString& ret, int nSrcLen );    //十六进制字符串转换为字节流    void Hex2Bin(  char* source, QByteArray& ret, int sourceLen);signals:public slots:};#endif // PHPCLASS_HPhpClass::PhpClass(QObject *parent) : QObject(parent){}void PhpClass::Bin2Hex( const char *sSrc,QString& ret, int nSrcLen ){    int  i;    char szTmp[3];    for( i = 0; i < nSrcLen; i++ )    {        sprintf( szTmp, "%02X", (unsigned char) sSrc[i] );        ret.append(szTmp);    }    return ;}void PhpClass::Hex2Bin(  char* source, QByteArray& ret, int sourceLen){    int i;    unsigned char highByte, lowByte;    for (i = 0; i < sourceLen; i += 2)    {        highByte = toupper(source[i]);        lowByte  = toupper(source[i + 1]);        if (highByte > 0x39)            highByte -= 0x37;        else            highByte -= 0x30;        if (lowByte > 0x39)            lowByte -= 0x37;        else            lowByte -= 0x30;        ret.push_back((highByte << 4) | lowByte);    }    return ;}

#ifndef FILECLASS_H#define FILECLASS_H#include <QObject>class FileClass : public QObject{    Q_OBJECTpublic:    explicit FileClass(QObject *parent = 0);    bool Read(char* file,QByteArray& ret);    bool Write(char* file,QByteArray& data);signals:public slots:};#endif // FILECLASS_H#include "fileclass.h"#include<QFile>#include<QDebug>FileClass::FileClass(QObject *parent) : QObject(parent){}bool FileClass::Read(char*file,QByteArray& ret){    QFile mfile(file);    if(!mfile.open(QIODevice::ReadOnly) )    {        qDebug()<<"文件不存在";        return  false;    }    qDebug()<<"文件存在";    ret = mfile.readAll();    mfile.close();    return  true;} bool FileClass::Write(char* file,QByteArray& data) {     QFile mfile(file);     if(!mfile.open(QIODevice::ReadWrite) )     {         qDebug()<<"文件不存在";         return false;     }     mfile.write(data);     mfile.close();     return  true; }

#include<phpclass.h>#include<fileclass.h>QVariant QmlClass::readimg(QString file){    FileClass mfile;    PhpClass  php;    QByteArray  ar;    QString m;    if(mfile.Read((char*)file.toStdString().c_str(),ar))    {        php.Bin2Hex(ar.data(),m,ar.size());        //2进制流转16进制字符串方式1        QByteArray dates;        php.Hex2Bin((char*)m.toStdString().data(),dates,m.length());        mfile.Write("./test.jpg",dates);    }    return m;}

function uploadimg()    {        var  x = new XMLHttpRequest();        x.onreadystatechange =function()        {            if(x.readyState == 4) {                if(x.status == 200) {                    console.log("The server replied with: " + x.responseText);                    txt.text = x.responseText;                }            }        };        var xxx =new Object;        var d=myapp.readimg(":/1.jpg");        console.log(typeof d)        x.open("POST","http://localhost/mycode/Test/reg.php",true);        console.log(d)        //post请求要自己设置请求头         x.setRequestHeader("Content-Type","application/x-www-form-urlencoded");        x.send(d);    }

<?php   $filename="teststream.jpg";//要生成的图片名字   $data_buff=file_get_contents("php://input");   echo  $data_buff;  $jpg = pack("H*",$data_buff);//得到post过来的二进制原始数据   $file = fopen("pic/".$filename,"wb");//打开文件准备写入  fwrite($file,$jpg);//写入  fclose($file);//关闭?>

使用post参数和base64编码:

    function uploadimg()    {        var  x = new XMLHttpRequest();        x.onreadystatechange =function()        {            if(x.readyState == 4) {                if(x.status == 200) {                    console.log("The server replied with: " + x.responseText);                    txt.text = x.responseText;                }            }        };        var xxx =new Object;        var d=myapp.readimg(":/main.qml");        console.log(typeof d)        x.open("POST","http://localhost/mycode/Test/reg.php",true);        console.log(Qt.btoa(d))        //post请求要自己设置请求头         x.setRequestHeader("Content-Type","application/x-www-form-urlencoded");        x.send("OBJ="+Qt.btoa(d));    }

<?php $filename = "teststream.jpg"; // 要生成的图片名字 $data_buff = base64_decode($_POST['OBJ']); $jpg = pack("H*", $data_buff); // 得到post过来的二进制原始数据 $file = fopen("pic/" . $filename, "wb"); // 打开文件准备写入fwrite($file, $jpg); // 写入fclose($file); // 关闭?>

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