Ubuntu 下的webservices

时间：2014-05-01 22:03:30 阅读：530 评论：0 收藏：0 [点我收藏+]

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搞了一下午：

开发服务器程序，需使用gSOAP生成服务器端代码框架。我们有两种做法：

编写WSDL，使用wsdl2h生成头文件，再soapcpp2生成框架代码；
编写头文件，使用soapcpp2生成框架代码；

这两种方式，结果是一样的，最终都有产生头文件，并生成代码。不同在于，在项目的开发中需要维护的文件不同，前者是需要维护WSDL文件，后者维护头文件。

我个人觉得第二种方式更好用，不仅仅是少了个步骤，而是WSDL的语法太难写了，有点XSD的味道。而头文件的编写，更接近于程序员的思考方式，比如定义消息结构，定义接口名称等。

gSOAP是非常智能的，它利用C/C++的注释来获取信息，所以在手工编写的头文件中，注释是用用处的，常以// gsoap 名字空间 …开头。做为学习，我准备为php blog程序wordpress写一个web service接口，名字叫wpsoap。

给出代码：

1

root@ubuntu:/home/aries/Aries/gsoap# cat add.h 
//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 );

注意：注释的的内容也必须加上

2 执行soapcpp2 -c add.h

3 添加一个服务端 addserver.c

root@ubuntu:/home/aries/Aries/gsoap# cat 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;
}

4 t添加客服端 addclient.c

root@ubuntu:/home/aries/Aries/gsoap# cat 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;
}

5 测试上面的addtest.c

root@ubuntu:/home/aries/Aries/gsoap# cat 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, &sum);

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

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

6 makefile

root@ubuntu:/home/aries/Aries/gsoap# cat makefile
GSOAP_ROOT = /mnt/hgfs/E/gsoap_2.8.17/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 $(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

root@ubuntu:/home/aries/Aries/gsoap# make
g++ -g -DWITH_NONAMESPACES    -c -o soapC.o soapC.c
g++ -g -DWITH_NONAMESPACES    -c -o stdsoap2.o stdsoap2.c
g++ -g -DWITH_NONAMESPACES    -c -o soapServer.o soapServer.c
g++ -g -DWITH_NONAMESPACES    -c -o addserver.o addserver.c
g++ -g -DWITH_NONAMESPACES -I/mnt/hgfs/E/gsoap_2.8.17/gsoap-2.8/gsoap -o addserver soapC.o stdsoap2.o soapServer.o addserver.o

继续 make client

最后文件如下：

add.add.req.xml addserver makefile soapH.h stdsoap2.h
add.add.res.xml addserver.c soapC.c soapServer.c stdsoap2.o
addclient.c addserver.o soapClient.c soapServerLib.c
addclient.o addtest soapClientLib.c soapServer.o
add.h addtest.c soapClient.o soapStub.h
add.nsmap addtest.o soapC.o stdsoap2.c

效果：

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