gsoap 简单使用

from:http://blog.csdn.net/jinpw/article/details/3346844

• 对gsoap的简单介绍，请自己参阅http://gsoap2.sourceforge.net/

    下载相应的包，主要有2个工具和源代码：
     wsdl2h -o outfile.h infile.wsdl 实现wsdl文件到h文件的数据映射
         soapcpp2 -c outfile.h生成相应的底层通信stub，strech程序

• 下面这个简单的例子实现的是在客户端输入2个数字，然后远程调用服务端的加法函数，最后返回结果给客户端。

    在这里我们不需要wsdl的文件，可以直接从.h文件来生成代码。我们定义一个函数声明文件，用来定义接口函数，名称为add.h，内容如下：

 //gsoapopt cw
 //gsoap ns2 schema namespace: urn:add
 //gsoap ns2 schema form: unqualified
 //gsoap ns2 service name: add
 //gsoap ns2 service type: addPortType
 //gsoap ns2 service port:http://websrv.cs.fsu.edu/~engelen/addserver.cgi
 //gsoap ns2 service namespace: urn:add
 //gsoap ns2 service transport: http://schemas.xmlsoap.org/soap/http
 //gsoap ns2  service method-style:      add rpc
 //gsoap ns2  service method-encoding:
 add http://schemas.xmlsoap.org/soap/encoding/
 //gsoap ns2  service method-action:     add ""
 int ns2__add( int num1, int num2, int* sum );

然后我们执行soapcpp2 -c add.h，自动生成一些远程调用需要的文件。

接下来我们写一个服务端，创建文件addserver.c

 #include "soapH.h"
 #include "add.nsmap"

 int main(int argc, char **argv)
 {
     int m, s;
     struct soap add_soap;
     soap_init(&add_soap);
     soap_set_namespaces(&add_soap, 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);
             soap_end(&add_soap);
         }
     }
     return 0;
 }

 int ns2__add(struct soap *add_soap, int num1, int num2, int *sum)
 {
     *sum = num1 + num2;
     return 0;
 }

我们接着写客户端，文件addclient.c

 #include "soapStub.h"
 #include "add.nsmap"

 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, namespaces);
     soap_call_ns2__add(&add_soap, server, NULL, num1, num2, sum);
     printf("server is %s, num1 is %d, num2 is %d/n", server, num1, num2);

     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;
 }

最后写一个测试代码，addtest.c

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 int add(const char *server, int num1, int num2, int *sum);
 int main(int argc, char **argv)
 {
     int result = -1;
     char server[128] = {0};
     int num1;
     int num2;
     int sum;

     if (argc < 4) {
         printf("usage: %s <ip:port> num1 num2 /n", argv[0]);
         exit(1);
     }

     strcpy(server,argv[1]);
     num1 = atoi(argv[2]);
     num2 = atoi(argv[3]);
     result = add(server, num1, num2, ∑);

     if (result != 0) {
         printf("soap error, errcode=%d/n", result);
     } else {
         printf("%d + %d = %d/n", num1, num2, sum);
     }
     return 0;
 }

到此为止，我们自己的代码已经编写完毕，现在我们来编译服务端和客户端
注意：编译的时候我们需要gsoap包里的源代码文件，把stdsoap2.c和stdsoap2.h文件拷贝到当前目录
我们写一个Makefile文件：

 GSOAP_ROOT = /root/gsoap-2.7/gsoap
 WSNAME = add
 CC = g++ -g -DWITH_NONAMESPACES
 INCLUDE = -I$(GSOAP_ROOT)
 SERVER_OBJS = soapC.o stdsoap2.o soapServer.o $(WSNAME)server.o
 CLIENT_OBJS = soapC.o stdsoap2.o soapClient.o $(WSNAME)client.o $(WSNAME)test.o

 all: server
 server: $(SERVER_OBJS)
     $(CC) $(INCLUDE) -o $(WSNAME)server $(SERVER_OBJS)

 client: $(CLIENT_OBJS)
     $(CC) $(INCLUDE) -o $(WSNAME)test $(CLIENT_OBJS)

 cl:
     rm -f *.o *.xml *.a *.wsdl *.nsmap soapH.h $(WSNAME)Stub.* $(WSNAME)server ns.xsd $(WSNAME)test

然后我们执行make，即可生产addserver程序；make client，生成addtest程序。
让server跑起来,执行./addserver 6666
终端打印出“Socket connection successful: master socket = 3”，那么你的server已经在前台run起来了；
运行客户端，./addtest ip:port num1 num2，返回加法的结果。

OK，一个最简单的soap调用的例子完成了，进深一步的学习请参考http://gsoap2.sourceforge.net/