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VC++ 实现soap服务端

2013-10-12 15:55 288 查看
gSOAP是一个夸平台的,用于开发Web Service服务端和客户端的工具,在Windows、Linux、MAC OS和UNIX下使用C和C++语言编码,集合了SSL功能。

下载地址:http://sourceforge.net/projects/gsoap2

官方网站:http://genivia.com/Products/gsoap/index.html

对于Windows平台下开发客户端,首先下载最新的gsoap_win32_2.7.6c.zip包,具体在以下地址:http://optusnet.dl.sourceforge.net/sourceforge/gsoap2/gsoap_win32_2.7.6c.zip
首先查看gsoap的User's Guide,基本就能对gsoap有个全面的了解,通过阅读Sample里的例子程序深入。然后搜索网上其它一些文章,比如:

gSOAP简单多线程服务器程序http://blog.chinaunix.net/u1/55091/showart_430965.html

纯c gSoap实现WebService http://hi.baidu.com/2sky2sea/blog/item/40ec5555680279c1b745ae9b.html

接下来我结合自己的实践与理解,讲讲VC用gsoap下编写webService和客户端程序,有不对的地方还请大家指正,谢谢。

我以网上出现的实现一个简单的加法函数为例,讲讲我在操作过程中遇到的问题。

一 服务器端

1.首先编写 add.h文件:

1

//gsoap ns service name: add

2

//gsoap ns service namespace: http://localhost/add.wsdl

3

//gsoap ns service location: http://localhost

4

//gsoap ns service executable: add.cgi

5

//gsoap ns service encoding: encoded

6

//gsoap ns schema namespace: urn:add

7


8

int ns__add( int num1, int num2, int* sum );

9


2.用gsoap/bin目录下的soapcpp2.exe程序,生成一些文件。可以把soapcpp2.exe拷贝到一add.h目录下,用cmd执行soapcpp2.exe add.h就可以,在这个目录下会自动生成许多将来有用的文件,如add.namap,soapH.h,soapC.cpp,soapClient.cpp,soapServer.cpp等文件。soapcpp2.exe可以带参数执行,具体执行soapcpp2.exe
-h查看。

3.新建一个win32控制台工程,加入wsock32.lib库,将刚才生成的那些文件添加到工程中。然后编写webserver.cpp主程序:


#include "add.h"


#include "add.nsmap"




int main(int argc, char* argv[])


{




int m, s; /* master and slave sockets */


struct soap add_soap;


soap_init(&add_soap);


//soap_set_namespaces(&add_soap, add_namespaces);




if (argc < 2)


{


printf("usage: %s <server_port> \n", argv[0]);


exit(1);


}


else


{


m = soap_bind(&add_soap, NULL, atoi(argv[1]), 100);


if (m < 0)


{


soap_print_fault(&add_soap, stderr);


exit(-1);


}




fprintf(stderr, "Socket connection successful: master socket = %d\n", m);


for ( ; ; )


{


s = soap_accept(&add_soap);


if (s < 0)


{


soap_print_fault(&add_soap, stderr);


exit(-1);


}


fprintf(stderr, "Socket connection successful: slave socket = %d\n", s);




soap_serve(&add_soap);//该句说明该server的服务


soap_end(&add_soap);


}


}


return 0;


}


//server端的实现函数与add.h中声明的函数相同,但是多了一个当前的soap连接的参数


int ns__add(struct soap *add_soap, int num1, int num2, int *sum)


{


*sum = num1 + num2;


return 0;


}



4. 编译这个程序,会提示错误,将gsoap_win32目录下stdsoap2.cpp,stdsoap2.h文件加入工程,重新编译如果还有错误,可能是你将add.h生成的文件添加入工程出错的原因。实际上在编写server程序时,无须带Client的那些文件,还有带Lib的文件也无须添加到工程中。再重新编译应该就没有问题了,启动4567端口,在ie中输入localhost:4567,如果显示xml页面,说明程序已经启动。

二 对应的客户端

1。客户端程序代码如下:


#include <stdio.h>


#include <stdlib.h>


#include "soapH.h"


#include "add.nsmap"






int add(const char* server, int num1, int num2, int *sum);




int main(int argc, char **argv)


{


int result = -1;


char* server="http://localhost:4567";


int num1 = 0;


int num2 = 0;


int sum = 0;


if( argc < 3 )


{


printf("usage: %s num1 num2 \n", argv[0]);


exit(0);


}




num1 = atoi(argv[1]);


num2 = atoi(argv[2]);




result = add(server, num1, num2, &sum);


if (result != 0)


{


printf("soap err,errcode = %d\n", result);


}


else


{


printf("%d+%d=%d\n", num1, num2, sum );


}


return 0;


}




int add( const char* server, int num1, int num2, int *sum )


{


struct soap add_soap;


int result = 0;


soap_init(&add_soap);


// soap_set_namespaces(&add_soap, add_namespaces);




//该函数是客户端调用的主要函数,后面几个参数和add.h中声明的一样,前面多了3个参数,函数名是接口函数名ns__add前面加上soap_call_


soap_call_ns__add( &add_soap, server, "", num1, num2, sum );


if(add_soap.error)


{


printf("soap error:%d,%s,%s\n", add_soap.error, *soap_faultcode(&add_soap), *soap_faultstring(&add_soap) );


result = add_soap.error;


}


soap_end(&add_soap);


soap_done(&add_soap);


return result;


}

2.客户端程序既可以新建一个新的win32控制台程序,将刚才生成的nsmap,soapH.h,soapClient.h等文件加入工程,编译既可。我是直接在原先工程中加入一客户端代码,将webserver.cpp文件移除,并且将soapServer.cpp等server端需要的文件移除,将soapClient.cpp等client端需要的cpp添加到工程,编译既可。

3.启动server程序,F5客户端程序,经测试正常。

三 遇到的问题

1.server端可以编译成CGI方式执行,而并不是绑定到某个端口,这种方式我没有实践。


if (argc < 2) // no args: assume this is a CGI application


{


soap_serve(&soap); // serve request, one thread, CGI style


soap_destroy(&soap); // dealloc C++ data


soap_end(&soap); // dealloc data and clean up


}
2.在编译服务器及客户端程序时一开始对add.h生成的文件添加到工程,经常出现问题,需要自己不调试。特别是链接时段,server/client要与其生成的文件相对应,server调用生成的soapserver.cpp,client调用生成的soapclient.cpp文件。

3.多线程方式,在windows下建议用pthread_win32库,这里给出多线程下的例子。


一 gSOAP需要的头文件:




//gsoap ns service name: calc


//gsoap ns service style: rpc


//gsoap ns service encoding: encoded


//gsoap ns service namespace: http://127.0.0.1:8089/calc.wsdl


//gsoap ns service location: http://127.0.0.1:8089/cal


//gsoap ns schema namespace: urn:calc


int ns__add(double a, double b, double *result);


int ns__sub(double a, double b, double *result);


int ns__mul(double a, double b, double *result);


int ns__div(double a, double b, double *result);


int ns__pow(double a, double b, double *result);




二 多线程服务器关键代码




#include


#include "calc.nsmap"


#include "soapH.h"




/////////////////////////////////////////////////////////////////////////


///宏与全局变量的定义


#define BACKLOG (100)


#define MAX_THR (10)


#define MAX_QUEUE (1000)






pthread_mutex_t queue_cs; //队列锁


pthread_cond_t queue_cv; //条件变量


SOAP_SOCKET queue[MAX_QUEUE]; //数组队列


int head =0, tail =0; //队列头队列尾初始化


//////////////////////////////////////////////////////////////////////////






//////////////////////////////////////////////////////////////////////////


void * process_queue(void *); //线程入口函数


int enqueue(SOAP_SOCKET); //入队列函数


SOAP_SOCKET dequeue(void); //出队列函数




//////////////////////////////////////////////////////////////////////////


//线程入口函数


void * process_queue(void * soap)


{


struct soap * tsoap = (struct soap *)soap;


for(;;)


{


tsoap->socket = dequeue();


if (!soap_valid_socket(tsoap->socket))


{


break;


}


soap_serve(tsoap);


soap_destroy(tsoap);


soap_end(tsoap);


}


return NULL;


}




//入队列操作


int enqueue(SOAP_SOCKET sock)


{


int status = SOAP_OK;


int next;


pthread_mutex_lock(&queue_cs);


next = tail +1;


if (next >= MAX_QUEUE)


next = 0;


if (next == head)


status = SOAP_EOM;


else


{


queue[tail] =sock;


tail = next;


}


pthread_cond_signal(&queue_cv);


pthread_mutex_unlock(&queue_cs);


return status;


}




//出队列操作


SOAP_SOCKET dequeue()


{


SOAP_SOCKET sock;


pthread_mutex_lock(&queue_cs);


while (head == tail )


{


pthread_cond_wait(&queue_cv,&queue_cs);


}


sock = queue[head++];


if (head >= MAX_QUEUE)


{


head =0;


}


pthread_mutex_unlock(&queue_cs);


return sock;


}






//////////////////////////具体服务方法////////////////////////////////////////


//加法的实现


int ns__add(struct soap *soap, double a, double b, double *result)


{


*result = a + b;


return SOAP_OK;


}


//减法的实现


int ns__sub(struct soap *soap, double a, double b, double *result)


{


*result = a - b;


return SOAP_OK;


}


//乘法的实现


int ns__mul(struct soap *soap, double a, double b, double *result)


{


*result = a * b;


return SOAP_OK;


}


//除法的实现


int ns__div(struct soap *soap, double a, double b, double *result)


{


if (b)


*result = a / b;


else


{


char *s = (char*)soap_malloc(soap, 1024);


sprintf(s, "Can't">http://tempuri.org/">Can't divide %f by %f", a, b);


return soap_sender_fault(soap, "Division by zero", s);


}


return SOAP_OK;


}


//乘方的实现


int ns__pow(struct soap *soap, double a, double b, double *result)


{


*result = pow(a, b);


if (soap_errno == EDOM) /* soap_errno 和errorno类似, 但是和widnows兼容 */


{


char *s = (char*)soap_malloc(soap, 1024);


sprintf(s, "Can't take the power of %f to %f", a, b);


sprintf(s, "Can't">http://tempuri.org/">Can't take power of %f to %f", a, b);


return soap_sender_fault(soap, "Power function domain error", s);


}


return SOAP_OK;


}




//////////////////////////////////////////////////////////////////////////////////////////////////////


//主函数


int main(int argc,char ** argv)


{


struct soap ServerSoap;


//初始话运行时环境


soap_init(&ServerSoap);


//如果没有参数,当作CGI程序处理


if (argc <2)


{


//CGI 风格服务请求,单线程


soap_serve(&ServerSoap);


//清除序列化的类的实例


soap_destroy(&ServerSoap);


//清除序列化的数据


soap_end(&ServerSoap);


}else


{


struct soap * soap_thr[MAX_THR];


pthread_t tid[MAX_THR];


int i,port = atoi(argv[1]);


SOAP_SOCKET m,s;


//锁和条件变量初始化


pthread_mutex_init(&queue_cs,NULL);


pthread_cond_init(&queue_cv,NULL);


//绑定服务端口


m = soap_bind(&ServerSoap,NULL,port,BACKLOG);


//循环直至服务套接字合法


while (!soap_valid_socket(m))


{


fprintf(stderr,"Bind port error! ");


m = soap_bind(&ServerSoap,NULL,port,BACKLOG);


}


fprintf(stderr,"socket connection successful %d ",m);




//生成服务线程


for(i = 0; i <MAX_THR; i++)




{


soap_thr[i] = soap_copy(&ServerSoap);


fprintf(stderr,"Starting thread %d ",i);


pthread_create(&tid[i],NULL,(void*(*)(void*))process_queue,(void*)soap_thr[i]);


}




for(;;)


{


//接受客户端的连接


s = soap_accept(&ServerSoap);


if (!soap_valid_socket(s))


{


if (ServerSoap.errnum)


{


soap_print_fault(&ServerSoap,stderr);


continue;


}else


{


fprintf(stderr,"Server timed out ");


break;


}


}


//客户端的IP地址


fprintf(stderr,"Accepted connection from IP= %d.%d.%d.%d socket = %d ",


((ServerSoap.ip)>>24)&&0xFF,((ServerSoap.ip)>>16)&0xFF,((ServerSoap.ip)>>8)&0xFF,(ServerSoap.ip)&0xFF,(ServerSoap.socket));


//请求的套接字进入队列,如果队列已满则循环等待


while(enqueue(s) == SOAP_EOM)


Sleep(1000);


}


//服务结束后的清理工作


for(i = 0; i < MAX_THR; i++)


{


while (enqueue(SOAP_INVALID_SOCKET) == SOAP_EOM)


{


Sleep(1000);


}


}


for(i=0; i< MAX_THR; i++)


{


fprintf(stderr,"Waiting for thread %d to terminate ..",i);


pthread_join(tid[i],NULL);


fprintf(stderr,"terminated ");


soap_done(soap_thr[i]);


free(soap_thr[i]);


}


pthread_mutex_destroy(&queue_cs);


pthread_cond_destroy(&queue_cv);


}


//分离运行时的环境


soap_done(&ServerSoap);


return 0;


}

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