linux下gsoap的初次使用 -- c风格加法实例

摘自:

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

https://www.cnblogs.com/dkblog/archive/2011/08/19/2145942.html

这两天,接到一个项目,需要在linux程序中调用远程的web应用,通过soap协议。开始上网查了下资料,发现了gsoap库这个好东东^_^。继续在网上搜索例子代码,发现基本都不可编译通过,于是便一边学习一边写了这个最简单的例子,希望对后来者起到一点帮助。

  • 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:

  1. //gsoapopt cw
  2. //gsoap ns2 schema namespace: urn:add
  3. //gsoap ns2 schema form: unqualified
  4. //gsoap ns2 service name: add
  5. //gsoap ns2 service type: addPortType
  6. //gsoap ns2 service port:http://websrv.cs.fsu.edu/~engelen/addserver.cgi
  7. //gsoap ns2 service namespace: urn:add
  8. //gsoap ns2 service transport: http://schemas.xmlsoap.org/soap/http
  9. //gsoap ns2 service method-style: add rpc
  10. //gsoap ns2 service method-encoding:
  11. add http://schemas.xmlsoap.org/soap/encoding/
  12. //gsoap ns2 service method-action: add ""
  13. 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

  1. #include "soapH.h"
  2. #include "add.nsmap"
  3. int main(int argc, char **argv)
  4. {
  5. int m, s;
  6. struct soap add_soap;
  7. soap_init(&add_soap);
  8. soap_set_namespaces(&add_soap, namespaces);
  9. if (argc < 2) {
  10. printf("usage: %s <server_port> /n", argv[0]);
  11. exit(1);
  12. } else {
  13. m = soap_bind(&add_soap, NULL, atoi(argv[1]), 100);
  14. if (m < 0) {
  15. soap_print_fault(&add_soap, stderr);
  16. exit(-1);
  17. }
  18. fprintf(stderr, "Socket connection successful: master socket = %d/n", m);
  19. for (;;) {
  20. s = soap_accept(&add_soap);
  21. if (s < 0) {
  22. soap_print_fault(&add_soap, stderr);
  23. exit(-1);
  24. }
  25. fprintf(stderr, "Socket connection successful: slave socket = %d/n", s);
  26. soap_serve(&add_soap);
  27. soap_end(&add_soap);
  28. }
  29. }
  30. return 0;
  31. }
  32. int ns2__add(struct soap *add_soap, int num1, int num2, int *sum)
  33. {
  34. *sum = num1 + num2;
  35. return 0;
  36. }

我们接着写客户端,文件addclient.c

  1. #include "soapStub.h"
  2. #include "add.nsmap"
  3. int add(const char *server, int num1, int num2, int *sum)
  4. {
  5. struct soap add_soap;
  6. int result = 0;
  7. soap_init(&add_soap);
  8. soap_set_namespaces(&add_soap, namespaces);
  9. soap_call_ns2__add(&add_soap, server, NULL, num1, num2, sum);
  10. printf("server is %s, num1 is %d, num2 is %d/n", server, num1, num2);
  11. if (add_soap.error) {
  12. printf("soap error: %d, %s, %s/n", add_soap.error, *soap_faultcode(&add_soap), *soap_faultstring(&add_soap));
  13. result = add_soap.error;
  14. }
  15. soap_end(&add_soap);
  16. soap_done(&add_soap);
  17. return result;
  18. }

最后写一个测试代码,addtest.c

  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. int add(const char *server, int num1, int num2, int *sum);
  5. int main(int argc, char **argv)
  6. {
  7. int result = -1;
  8. char server[128] = {0};
  9. int num1;
  10. int num2;
  11. int sum;
  12. if (argc < 4) {
  13. printf("usage: %s <ip:port> num1 num2 /n", argv[0]);
  14. exit(1);
  15. }
  16. strcpy(server,argv[1]);
  17. num1 = atoi(argv[2]);
  18. num2 = atoi(argv[3]);
  19. result = add(server, num1, num2, ∑);
  20. if (result != 0) {
  21. printf("soap error, errcode=%d/n", result);
  22. } else {
  23. printf("%d + %d = %d/n", num1, num2, sum);
  24. }
  25. return 0;
  26. }

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:

  1. GSOAP_ROOT = /root/gsoap-2.7/gsoap
  2. WSNAME = add
  3. CC = g++ -g -DWITH_NONAMESPACES
  4. INCLUDE = -I$(GSOAP_ROOT)
  5. SERVER_OBJS = soapC.o stdsoap2.o soapServer.o $(WSNAME)server.o
  6. CLIENT_OBJS = soapC.o stdsoap2.o soapClient.o $(WSNAME)client.o $(WSNAME)test.o
  7. all: server
  8. server: $(SERVER_OBJS)
  9. $(CC) $(INCLUDE) -o $(WSNAME)server $(SERVER_OBJS)
  10. client: $(CLIENT_OBJS)
  11. $(CC) $(INCLUDE) -o $(WSNAME)test $(CLIENT_OBJS)
  12. cl:
  13. 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/