gsoap使用心得!

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最近换了个工作环境,现在在大望路这边上班,呵,刚上班接到的任务就是熟悉gsoap!废话少说,现在开始gSoap学习!

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

8int 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;

}


http://www.cppblog.com/qiujian5628/archive/2008/06/19/54019.html

转载于:https://blog.51cto.com/zgqwork/491407


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