gSOAP是一個誇平台的,用于開發Web Service服務端和用戶端的工具,在Windows、Linux、MAC OS和UNIX下使用C和C++語言編碼,集合了SSL功能。
下載下傳位址:http://sourceforge.net/projects/gsoap2
官方網站:http://genivia.com/Products/gsoap/index.html
對于Windows平台下開發用戶端,首先下載下傳最新的gsoap_win32_2.7.6c.zip包,具體在以下位址:http://optusnet.dl.sourceforge.net/sourceforge/gsoap2/gsoap_win32_2.7.6c.zip
首先檢視gsoap的User's Guide,基本就能對gsoap有個全面的了解,通過閱讀Sample裡的例子程式深入。然後搜尋網上其它一些文章,比如:
gSOAP簡單多線程伺服器程式 http://blog.chinaunix.net/u1/55091/showart_430965.html純c gSoap實作WebService http://hi.baidu.com/2sky2sea/blog/item/40ec5555680279c1b745ae9b.html
接下來我結合自己的實踐與了解,講講VC用gsoap下編寫webService和用戶端程式,有不對的地方還請大家指正,謝謝。
我以網上出現的實作一個簡單的加法函數為例,講講我在操作過程中遇到的問題。
一 伺服器端
1.首先編寫 add.h檔案:
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目錄下的soapcpp2.exe程式,生成一些檔案。可以把soapcpp2.exe拷貝到一add.h目錄下,用cmd執行soapcpp2.exe add.h就可以,在這個目錄下會自動生成許多将來有用的檔案,如add.namap,soapH.h,soapC.cpp,soapClient.cpp,soapServer.cpp等檔案。soapcpp2.exe可以帶參數執行,具體執行soapcpp2.exe -h檢視。
3.建立一個win32控制台工程,加入wsock32.lib庫,将剛才生成的那些檔案添加到工程中。然後編寫webserver.cpp主程式:

#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);//該句說明該server的服務
soap_end(&add_soap);
return 0;
}

//server端的實作函數與add.h中聲明的函數相同,但是多了一個目前的soap連接配接的參數

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

4. 編譯這個程式,會提示錯誤,将gsoap_win32目錄下stdsoap2.cpp,stdsoap2.h檔案加入工程,重新編譯如果還有錯誤,可能是你将add.h生成的檔案添加入工程出錯的原因。實際上在編寫server程式時,無須帶Client的那些檔案,還有帶Lib的檔案也無須添加到工程中。再重新編譯應該就沒有問題了,啟動4567端口,在ie中輸入localhost:4567,如果顯示xml頁面,說明程式已經啟動。
二 對應的用戶端
1。用戶端程式代碼如下:

#include <stdio.h>

#include <stdlib.h>

#include "soapH.h"




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


int add( const char* server, int num1, int num2, int *sum )
int result = 0;
// soap_set_namespaces(&add_soap, add_namespaces);
//該函數是用戶端調用的主要函數,後面幾個參數和add.h中聲明的一樣,前面多了3個參數,函數名是接口函數名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.用戶端程式既可以建立一個新的win32控制台程式,将剛才生成的nsmap,soapH.h,soapClient.h等檔案加入工程,編譯既可。我是直接在原先工程中加入一用戶端代碼,将webserver.cpp檔案移除,并且将soapServer.cpp等server端需要的檔案移除,将soapClient.cpp等client端需要的cpp添加到工程,編譯既可。
3.啟動server程式,F5用戶端程式,經測試正常。
三 遇到的問題
1.server端可以編譯成CGI方式執行,而并不是綁定到某個端口,這種方式我沒有實踐。

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.在編譯伺服器及用戶端程式時一開始對add.h生成的檔案添加到工程,經常出現問題,需要自己不調試。特别是連結時段,server/client要與其生成的檔案相對應,server調用生成的soapserver.cpp,client調用生成的soapclient.cpp檔案。
3.多線程方式,在windows下建議用pthread_win32庫,這裡給出多線程下的例子。

一 gSOAP需要的頭檔案:


//gsoap ns service name: calc

//gsoap ns service style: rpc


//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 多線程伺服器關鍵代碼


#include

#include "calc.nsmap"

#include "soapH.h"

/////////////////////////////////////////////////////////////////////////
///宏與全局變量的定義

#define BACKLOG (100)

#define MAX_THR (10)

#define MAX_QUEUE (1000)



pthread_mutex_t queue_cs; //隊列鎖

pthread_cond_t queue_cv; //條件變量

SOAP_SOCKET queue[MAX_QUEUE]; //數組隊列

int head =0, tail =0; //隊列頭隊列尾初始化
//////////////////////////////////////////////////////////////////////////

void * process_queue(void *); //線程入口函數

int enqueue(SOAP_SOCKET); //入隊列函數

SOAP_SOCKET dequeue(void); //出隊列函數


//線程入口函數

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;


//入隊列操作

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;


//出隊列操作

SOAP_SOCKET dequeue()
SOAP_SOCKET sock;
while (head == tail )
{
pthread_cond_wait(&queue_cv,&queue_cs);
}
sock = queue[head++];
if (head >= MAX_QUEUE)
head =0;
return sock;


//////////////////////////具體服務方法////////////////////////////////////////

//加法的實作

int ns__add(struct soap *soap, double a, double b, double *result)
*result = a + b;
return SOAP_OK;
}

//減法的實作

int ns__sub(struct soap *soap, double a, double b, double *result)
{
*result = a - b;
return SOAP_OK;

//乘法的實作

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

//除法的實作

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;

//乘方的實作

int ns__pow(struct soap *soap, double a, double b, double *result)
*result = pow(a, b);
if (soap_errno == EDOM) /* soap_errno 和errorno類似, 但是和widnows相容 */
{
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);

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

//主函數

int main(int argc,char ** argv)
struct soap ServerSoap;
//初始話運作時環境
soap_init(&ServerSoap);
//如果沒有參數,當作CGI程式處理
if (argc <2)
{
//CGI 風格服務請求,單線程
soap_serve(&ServerSoap);
//清除序列化的類的執行個體
soap_destroy(&ServerSoap);
//清除序列化的資料
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;
//鎖和條件變量初始化
pthread_mutex_init(&queue_cs,NULL);
pthread_cond_init(&queue_cv,NULL);
//綁定服務端口
m = soap_bind(&ServerSoap,NULL,port,BACKLOG);
//循環直至服務套接字合法
while (!soap_valid_socket(m))
fprintf(stderr,"Bind port error! ");
m = soap_bind(&ServerSoap,NULL,port,BACKLOG);
fprintf(stderr,"socket connection successful %d ",m);
//生成服務線程
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(;;)
//接受用戶端的連接配接
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;
}
//用戶端的IP位址
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));
//請求的套接字進入隊列,如果隊列已滿則循環等待
while(enqueue(s) == SOAP_EOM)
Sleep(1000);
//服務結束後的清理工作
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);
//分離運作時的環境
soap_done(&ServerSoap);
return 0;
