用C实现WebService

用C实现WebService
2005-09-23 15:13 pm

一．系统环境 2
二．gSOAP的简要使用例子 2
三．图示说明 6
四．要注意的问题 6
五．参考文档 7
六．备注 7

一．系统环境
linux操作系统kernel2.4.2，安装gsoap2.6到目录/usr/local/gsoap
二．gSOAP的简要使用例子
下面是一个简单的例子，实现一个加法运算的WebService，具体功能是cli端输入num1和num2，server端返回一个num1和num2相加的结果sum。

1． 首先，我们需要做的是写一个函数声明文件，来定义接口函数ns__add，文件名字为add.h，内容如下：

//gsoap ns service name: add
//gsoap ns service namespace: http://mail.263.net/add.wsdl
//gsoap ns service location: http://mail.263.net
//gsoap ns service executable: add.cgi
//gsoap ns service encoding: encoded
//gsoap ns schema namespace: urn:add

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

2． 然后我们需要创建文件Makefile，从而利用gsoapcpp2工具由add.h生成一些.xml文件、.c文件和.h文件，这些文件均为自动生成，Makefile的内容如下：

GSOAP_ROOT=/usr/local/gsoap
WSNAME=add
CC=g++ -g -DWITH_NONAMESPACES
INCLUDE=-I $(GSOAP_ROOT)
SERVER_OBJS=$(WSNAME)C.o $(WSNAME)Server.o stdsoap2.o
CLIENT_OBJS=$(GSOAP_ROOT)/env/envC.o $(WSNAME)ClientLib.o stdsoap2.o
ALL_OBJS=${WSNAME}server.o $(WSNAME)C.o $(WSNAME)Server.o ${WSNAME}test.o ${WSNAME}client.o $(WSNAME)ClientLib.o

#总的目标
all:server

${WSNAME}.wsdl:${WSNAME}.h
$(GSOAP_ROOT)/soapcpp2 -p$(WSNAME) -i -n -c ${WSNAME}.h

stdsoap2.o:$(GSOAP_ROOT)/stdsoap2.c
$(CC) -c $?

#编译一样生成规则的.o文件
$(ALL_OBJS):%.o:%.c
$(CC) -c $? $(INCLUDE)

#编译服务器端
server:Makefile ${WSNAME}.wsdl ${WSNAME}server.o $(SERVER_OBJS)
$(CC) ${WSNAME}server.o $(SERVER_OBJS) -o ${WSNAME}server

#编译客户端
client:Makefile ${WSNAME}.wsdl ${WSNAME}client.c ${WSNAME}test.c $(ALL_OBJS) stdsoap2.o
$(CC) ${WSNAME}test.o ${WSNAME}client.o $(CLIENT_OBJS) -o ${WSNAME}test

cl:
rm -f *.o *.xml *.a *.wsdl *.nsmap $(WSNAME)H.h $(WSNAME)C.c $(WSNAME)Server.c $(WSNAME)Client.c $(WSNAME)Stub.* $(WSNAME)$(WSNAME)Proxy.* $(WSNAME)$(WSNAME)Object.* $(WSNAME)ServerLib.c $(WSNAME)ClientLib.c $(WSNAME)server ns.xsd $(WSNAME)test

3．我们先来做一个server端，创建文件addserver.c文件，内容如下：

#include "addH.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 ( ; ; )
{