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  • GoAhead2.5移植到ARM教程

    1、下载GoAhead2.5

      下载地址:https://github.com/embedthis/goahead/releases?after=v3.1.2

    2、编译

      先解压到虚拟机的/opt目录下,cd /opt/goahead-2.5.0/LINUX,修改Makefile文件,在文件的最前面添加如下代码:

      CROSS_COMPILE =/opt/arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
      AS = $(CROSS_COMPILE)as
      LD = $(CROSS_COMPILE)ld
      CC = $(CROSS_COMPILE)gcc
      CPP = $(CC) -E
      AR = $(CROSS_COMPILE)ar
      NM = $(CROSS_COMPILE)nm
      STRIP = $(CROSS_COMPILE)strip
      OBJCOPY = $(CROSS_COMPILE)objcopy
      OBJDUMP = $(CROSS_COMPILE)objdump

      修改输出库名称:

      ARCH = libwebs_arm_linux_gnueabihf.a

      注释掉SSL功能,并保存

      #matrixsslDir:=$(shell ls -d ../matrixssl-3-1*/)

      make

      这时会在LINUX目录下生成libwebs_arm_linux_gnueabihf.a库,/opt/goahead-2.5.0目录下所有头文件(wsInitn.h、websSSL.h、websda.h、webs.h、um.h、uemf.h、md5.h、matrixSSLSocket.h、emfdb.h、ejIntrn.h、ej.h)和libwebs_arm_linux_gnueabihf.a库可以用于开发webserver程序,/opt/goahead-2.5.0/LINUX目录下的main.c文件中webserver启动过程可以用于自己开发webserver程序的一部分,以Qt开发为例,可以单独创建一个线程QWebServerThread。

    头文件qwebserverthread.h

    class QWebServerThread : public QThread

    {

      Q_OBJECT

    public:

      QWebServerThread(QString strWeb,QString strIP,int nPort,int nRPort);

      ~QWebServerThread ();

      int initWeb();

      static int websHomePageHandler(webs_t wp, char_t *urlPrefix, char_t *webDir,int arg, char_t *url, char_t *path, char_t *query);

    #ifdef B_STATS
      void memLeaks();
      void printMemStats(int handle, char_t *fmt, ...);
    #endif

    protected:

      void run();

    private:

      QString strWeb;

      QString strIP;

      int nPort;

      int nRPort;

    }

    cpp文件qwebserverthread.cpp

    #include "qwebserverthread.h"

    WebServerThread::QWebServerThread(QString strWeb,QString strIP,int nPort)

    {

      this->strWeb = WebRoot;

      this->strIP = strIP;

      this->nPort = nPort;

      this->nRPort = nRPort;

    }

    QWebServerThread::~QWebServerThread()

    {

    }

    void QWebServerThread::run()

    { 

      /*
      *首先分配一个大的内存块(60*1024字节),以后只要是以b开头的对内存操作的函数都是在这个已经分好的内存块上的操作,这些操作在Balloc.c中实现。
      */
      bopen(NULL,(60 * 1024),B_USE_MALLOC);

      /*
      *忽略SIGPIPE信号
      */
      signal(SIGPIPE,SIG_IGN);

      /*
      *Initialize the web server
      *初始化用户管理部分,打开web服务器,注册URL处理函数。
      *用户管理部分在um.c中实现,
      *Web服务器的初始化是在default.c和webs.c中实现
      *url处理函数在handler.c中实现
      */
      if(initWeb() < 0)
      {
        printf("initWeb error. ");
        return;
      }

      /*
      *初始化Ssl认证部分
      *注:在这个文档中对ssl认证不做研究
      */
      #ifdef WEBS_SSL_SUPPORT
      websSSLOpen();
      #endif

      /*
      * Basic event loop. SocketReady returns true when a socket is ready for
      * service. SocketSelect will block until an event occurs. SocketProcess
      * will actually do the servicing.
      */
      /*
      *主循环
      */
      while(getRunState())
      {
        /*
        1,socketReady()函数检查是否有准备好的sock事件
        2,socketSelect()函数首先把各个sock感兴趣的事件(sp->handlerMask)注册给三个集合(读,写,例外),然后调用select系统调用,然后更新各个sock的sp->currentEvents,表示各个sock的当前状态。
        这两个函数在sockGen.c中实现,他们主要操作的数据是socket_t变量socketList中的handlerMask和currentEvents,socketList在sock.c中定义并主要由该文件中的socketAlloc,socketFree和socketPtr三个函数维护。
        */
        if(socketReady(-1) || socketSelect(-1,1000))
        {
          /*
          该函数处理具体的sock事件
          1,调用socketReady(sid)对socketList[sid]进行检查,看是否有sock事件
          2,如果有sock事件,则调用socketDoEvent()函数,对事件进行处理
          */
          socketProcess(-1);
        }
        /*
        该函数在cgi.c中实现,检查cgiRec变量cgilist,首先把cgi的结果输出,如果有的话,然后看cgi进程是否已对号束,如果结束,就清理该cgi进程。
        Cgilist在函数websCgiHandler和websCgiCleanup中维护。
        */
        websCgiCleanup();
        /*
        该函数在websuemf.c中实现,功能是检查sched_t变量sched,断开超时的连接,sched变量在emfSchedCallback和emfUnschedCallback中维护
        */
        emfSchedProcess();
      }

      /*
      退出时的清理工作,永远不会执行到这里
      */
    #ifdef WEBS_SSL_SUPPORT
      websSSLClose();
    #endif

    #ifdef USER_MANAGEMENT_SUPPORT
      umClose();
    #endif

      //Close the socket module, report memory leaks and close the memory allocator
      websCloseServer();
      socketClose();
    #ifdef B_STATS
      memLeaks();
    #endif
      bclose();

    }

    int QWebServerThread::initWeb()
    {

      //Initialize the socket subsystem
      socketOpen();

    #ifdef USER_MANAGEMENT_SUPPORT
      /*
      * Initialize the User Management database
      */
      umOpen();
      umRestore((char_t*)_T("umconfig.txt"));
    #endif

      /*
      * Define the local Ip address, host name, default home page and the
      * root web directory.
      */

      struct in_addr intaddr;

      intaddr.s_addr = inet_addr(strIP .toUtf8().data()); 

      /*
      * Set ../www as the root web
      */

      char *cp;

      char* dir = NULL;

      getcwd(dir, sizeof(dir));
      if ((cp = strrchr(dir, '/')))

       {
        *cp = '';
      }

      char* WebDir = NULL;
      sprintf(WebDir, "%s/%s", dir, strWeb.toUtf8().data());

      /*
      * Configure the web server options before opening the web server
      */
      websSetDefaultDir(pWebDir);

      SAVE_DELETE_ARRAY(dir);
      SAVE_DELETE_ARRAY(WebDir);

      char_t wbuf[128] = {0};  

      char *cp = inet_ntoa(intaddr);
      ascToUni(wbuf, cp, min(strlen(cp) + 1, sizeof(wbuf)));
      websSetIpaddr(wbuf);
      ascToUni(wbuf, host, min(strlen(host) + 1, sizeof(wbuf)));
      websSetHost(wbuf);

      /*
      * Configure the web server options before opening the web server
      */

      websSetDefaultPage("default.asp");
      websSetPassword( (char_t*)_T(""));

      /*
      * Open the web server on the given port. If that port is taken, try
      * the next sequential port for up to "retries" attempts.
      */
      websOpenServer(m_nPort, nRPort);

      /*
      * First create the URL handlers. Note: handlers are called in sorted order
      * with the longest path handler examined first. Here we define the security
      * handler, forms handler and the default web page handler.
      */
      websUrlHandlerDefine((char_t*)_T(""), NULL, 0, websSecurityHandler,WEBS_HANDLER_FIRST);
      websUrlHandlerDefine((char_t*)_T("/goform"), NULL, 0, websFormHandler, 0);
      websUrlHandlerDefine((char_t*)_T("/cgi-bin"), NULL, 0, websCgiHandler, 0);
      websUrlHandlerDefine((char_t*)_T(""), NULL, 0, websDefaultHandler,WEBS_HANDLER_LAST);

      /*
      * Now define two test procedures. Replace these with your application
      * relevant ASP script procedures and form functions.
      */
      registeredHandler(); //注册函数 如asp函数和表单处理函数(自定义函数)
      /*
      * Create the Form handlers for the User Management pages
      */
      #ifdef USER_MANAGEMENT_SUPPORT
      formDefineUserMgmt();
      #endif

      /*
      * Create a handler for the default home page
      */
      websUrlHandlerDefine((char_t*)_T("/"),NULL,0,websHomePageHandler,0);

      return 0;
    }

    //Home page handler
    int QWebServerThread::websHomePageHandler(webs_t wp, char_t *urlPrefix, char_t *webDir,int arg, char_t *url, char_t *path, char_t *query)
    {
      (void*)(urlPrefix);
      (void*)(webDir);
      (void*)(arg);
      (void*)(path);
      (void*)(query);

      //If the empty or "/" URL is invoked, redirect default URLs to the home page
      if(*url == '' || gstrcmp(url, (char_t*)_T("/")) == 0)
      {
        websRedirect(wp, (char_t*)WEBS_DEFAULT_HOME);
        return 1;
      }
      return 0;
    }

    #ifdef B_STATS
    void QWebBase::memLeaks()
    {
    int fd;

    if ((fd = gopen(_T("leak.txt"), O_CREAT | O_TRUNC | O_WRONLY, 0666)) >= 0) {
    bstats(fd, printMemStats);
    close(fd);
    }
    }

    //Print memory usage / leaks
    void QWebBase::printMemStats(int handle, char_t *fmt, ...)
    {
    va_list args;
    char_t buf[256];

    va_start(args, fmt);
    vsprintf(buf, fmt, args);
    va_end(args);
    write(handle, buf, strlen(buf));
    }
    #endif

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  • 原文地址:https://www.cnblogs.com/zhangnianyong/p/8405570.html
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