一、gSOAP简介
gSOAP一种跨平台的C和 C++软件开发工具包。生成C/C++的RPC代码，XML数据绑定，对SOAP Web服务和其他应用形成高效的具体架构解析器，它们都受益于一个XML接口。 这个工具包提供了一个全面和透明的XML数据绑定解决方案，Autocoding节省大量开发时间来执行SOAP/XML Web服务中的C/C++。此外，使用XML数据绑定大大简化了XML自动映射。应用开发人员不再需要调整应用程序逻辑的具体库和XML为中心的数据，如 交涉DOM。
二、gSOAP安装
1、准备工作
操作系统：centos6.5
位数：64位
gSOAP下载地址：http://sourceforge.net/projects/gsoap2/files/
本文gSOAP为：gsoap_2.8.33.zip
2、解压源码 #unzip gsoap_2.8.33.zip 3、配置 #cd gsoap-2.8 #./configure --prefix=/usr/local/gSOAP 4、编译安装 #make 三、make出错处理
（1）ylwrap: line 176: yacc: command not found。
yacc是一个生成语法分析器的工具。 #yum install byacc （2）missing: line 81: flex: command not found。 #yum install flex （需重新配置安装路径）
（3）/usr/bin/ld: cannot find -ly #yum install yum install bison-devel （4）../../gsoap/stdsoap2.h:690:19:error:zlib.h:No such file or directory #yum install zlib-devel （5）error: openssl/bio.h: No such file or directory #yum install openssl-devel （6）undefined reference to soap_ssl_init'
出现该错误，回到上级目录，删除我们解压的目录，重新解压，执行第二步gSOAP安装，make后未报错误，执行 #make install
安装成功，会在/usr/local/gSOAP目录下生成我们需要的文件
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 四、简单测试程序
1、头文件
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，乘法函数，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。我们新建一个文件夹soap，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 add http://schemas.xmlsoap.org/soap/encoding/ //gsoap ns2 service method-action: add "" int ns2__add( int num1, int num2, int* sum ); int ns2__sub( int num1, int num2, int *sub); 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。由于我们生成在/usr/local/gSOAP目录下，因此 #/usr/local/gSOAP/bin/soapcpp2 -c add.h 2、服务端，创建文件addserver.c #include #include #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 /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 ", 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 ", 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; } int ns2__sub(struct soap *sub_soap, int num1, int num2, int *sub) { *sub = num1 - num2; return 0; } 3、客户端，文件addclient.c #include #include #include "soapStub.h" #include "add.nsmap" int add(const char *server, int num1, int num2, int *sum); int sub(const char *server, int num1, int num2, int *sub); 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 num1 num2 /n", argv[0]); exit(1); } strcpy(server,argv[1]); num1 = atoi(argv[2]); num2 = atoi(argv[3]); result = add(server, num1, num2, &sum); if (result != 0) { printf("soap error, errcode=%d ", result); } else { printf("%d + %d = %d ", num1, num2, sum); } result = sub(server, num1, num2, &sum); if (result != 0) { printf("soap error, errcode=%d ", result); } else { printf("%d - %d = %d ", 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, namespaces); soap_call_ns2__add(&add_soap, server, NULL, num1, num2, sum); printf("server is %s, num1 is %d, num2 is %d ", server, num1, num2); if (add_soap.error) { printf("soap error: %d, %s, %s ", 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; } int sub(const char *server, int num1, int num2, int *sub) { struct soap add_soap; int result = 0; soap_init(&add_soap); soap_set_namespaces(&add_soap, namespaces); soap_call_ns2__sub(&add_soap, server, NULL, num1, num2, sub); printf("server is %s, num1 is %d, num2 is %d ", server, num1, num2); if (add_soap.error) { printf("soap error: %d, %s, %s ", 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; } 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 #cp /opt/gsoap-2.8/gsoap/stdsoap2.c stdsoap2.h ./ 4、编写Makefile GSOAP_ROOT = /root/gsoap-2.8/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 all: server server: $(SERVER_OBJS) $(CC) $(INCLUDE) -o $(WSNAME)server $(SERVER_OBJS) client: $(CLIENT_OBJS) $(CC) $(INCLUDE) -o $(WSNAME)client $(CLIENT_OBJS) clean: rm -f *.o *.xml *.a *.wsdl *.nsmap soap* $(WSNAME)Stub.* $(WSNAME)server ns.xsd $(WSNAME)test 5、编译 #make server #make client 编译生成服务端执行程序addserver和客户端执行程序addclient
6、执行
（1）在终端上执行服务器程序 #./addserver 8888 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
（2）新建另一终端执行客户端程序 #./addclient http://localhost:8888 99 22 [root@localhost gsoap]# ./addclient http://localhost:8888 99 22 server is http://localhost:8888, num1 is 99, num2 is 22 99 + 22 = 121 server is http://localhost:8888, num1 is 99, num2 is 22 99 - 22 = 77 [root@localhost gsoap]#