gsoap使用心得!
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gsoap使用心得!
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From: http://www.cppblog.com/qiujian5628/archive/2008/06/19/54019.html
完整源碼下載
gSOAP是一個夸平臺的，用于開發Web Service服務端和客戶端的工具，在Windows、Linux、MAC OS和UNIX下使用C和C++語言編碼，集合了SSL功能。
下載地址：http://sourceforge.net/projects/gsoap2
官方網站：http://genivia.com/Products/gsoap/index.html
對于Windows平臺下開發客戶端，首先下載最新的gsoap_win32_2.7.6c.zip包，具體在以下地址：http://optusnet.dl.sourceforge.net/sourceforge/gsoap2/gsoap_win32_2.7.6c.zip
首先查看gsoap的User's Guide，基本就能對gsoap有個全面的了解，通過閱讀Sample里的例子程序深入。然后搜索網上其它一些文章，比如：gSOAP簡單多線程服務器程序 http://blog.chinaunix.net/u1/55091/showart_430965.html
純c gSoap實現WebService??????????? http://hi.baidu.com/2sky2sea/blog/item/40ec5555680279c1b745ae9b.html?
接下來我結合自己的實踐與理解，講講VC用gsoap下編寫webService和客戶端程序，有不對的地方還請大家指正，謝謝。
我以網上出現的實現一個簡單的加法函數為例，講講我在操作過程中遇到的問題。
一 服務器端
1.首先編寫 add.h文件：
1//gsoap?ns?service?name:?add
2//gsoap?ns?service?namespace:?http://localhost/add.wsdl
3//gsoap?ns?service?location:?http://localhost
4//gsoap?ns?service?executable:?add.cgi
5//gsoap?ns?service?encoding:?encoded
6//gsoap?ns?schema?namespace:?urn:add
7
8int?ns__add(?int?num1,?int?num2,?int*?sum?);
9
2.用gsoap/bin目錄下的soapcpp2.exe程序，生成一些文件。可以把soapcpp2.exe拷貝到一add.h目錄下，用cmd執行soapcpp2.exe add.h就可以，在這個目錄下會自動生成許多將來有用的文件，如add.namap,soapH.h,soapC.cpp,soapClient.cpp,soapServer.cpp等文件。soapcpp2.exe可以帶參數執行，具體執行soapcpp2.exe -h查看。
3.新建一個win32控制臺工程，加入wsock32.lib庫，將剛才生成的那些文件添加到工程中。然后編寫webserver.cpp主程序：
#include?"add.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?(?;?;?)
????????{?
????????????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);//該句說明該server的服務
????????????soap_end(&add_soap);
????????}
????}
????return?0;
}
//server端的實現函數與add.h中聲明的函數相同，但是多了一個當前的soap連接的參數
int?ns__add(struct?soap?*add_soap,?int?num1,?int?num2,?int?*sum)
{
????*sum?=?num1?+?num2;
????return?0;
}
4. 編譯這個程序，會提示錯誤，將gsoap_win32目錄下stdsoap2.cpp，stdsoap2.h文件加入工程，重新編譯如果還有錯誤，可能是你將add.h生成的文件添加入工程出錯的原因。實際上在編寫server程序時，無須帶Client的那些文件，還有帶Lib的文件也無須添加到工程中。再重新編譯應該就沒有問題了，啟動4567端口，在ie中輸入localhost:4567,如果顯示xml頁面，說明程序已經啟動。
二 對應的客戶端
1。客戶端程序代碼如下:
#include?<stdio.h>
#include?<stdlib.h>
#include?"soapH.h"
#include?"add.nsmap"
int?add(const?char*?server,?int?num1,?int?num2,?int?*sum);
int?main(int?argc,?char?**argv)?
{
????int?result?=?-1;
????char*?server="http://localhost:4567";
????int?num1?=?0;
????int?num2?=?0;
????int?sum?=?0;
????if(?argc?<?3?)
????{
????????printf("usage:?%s?num1?num2?\n",?argv[0]);
????????exit(0);
????}
????
????num1?=?atoi(argv[1]);
????num2?=?atoi(argv[2]);
????
????result?=?add(server,?num1,?num2,?&sum);
????if?(result?!=?0)
????{
????????printf("soap?err,errcode?=?%d\n",?result);
????}
????else
????{
????????printf("%d+%d=%d\n",?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,?add_namespaces);
????
????//該函數是客戶端調用的主要函數，后面幾個參數和add.h中聲明的一樣，前面多了3個參數，函數名是接口函數名ns__add前面加上soap_call_
????soap_call_ns__add(?&add_soap,?server,?"",?num1,?num2,?sum?);
????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;
}
2.客戶端程序既可以新建一個新的win32控制臺程序，將剛才生成的nsmap,soapH.h,soapClient.h等文件加入工程，編譯既可。我是直接在原先工程中加入一客戶端代碼，將webserver.cpp文件移除，并且將soapServer.cpp等server端需要的文件移除，將soapClient.cpp等client端需要的cpp添加到工程，編譯既可。
3.啟動server程序，F5客戶端程序，經測試正常。
三 遇到的問題
1.server端可以編譯成CGI方式執行，而并不是綁定到某個端口，這種方式我沒有實踐。
if?(argc?<?2)?//?no?args:?assume?this?is?a?CGI?application?
???{?
??????soap_serve(&soap);?//?serve?request,?one?thread,?CGI?style?
??????soap_destroy(&soap);?//?dealloc?C++?data?
??????soap_end(&soap);?//?dealloc?data?and?clean?up?
} 2.在編譯服務器及客戶端程序時一開始對add.h生成的文件添加到工程，經常出現問題，需要自己不調試。特別是鏈接時段，server/client要與其生成的文件相對應，server調用生成的soapserver.cpp，client調用生成的soapclient.cpp文件。
3.多線程方式，在windows下建議用pthread_win32庫，這里給出多線程下的例子。
一?gSOAP需要的頭文件：
// gsoap?ns?service?name:?calc
// gsoap?ns?service?style:?rpc
// gsoap?ns?service?encoding:?encoded
// gsoap?ns?service?namespace:? http://127.0.0.1 :8089/calc.wsdl
// gsoap?ns?service?location:? http://127.0.0.1 :8089/cal
// gsoap?ns?schema??namespace:????urn:calc
int ?ns__add( double ?a,? double ?b,? double ? * result);
int ?ns__sub( double ?a,? double ?b,? double ? * result);
int ?ns__mul( double ?a,? double ?b,? double ? * result);
int ?ns__div( double ?a,? double ?b,? double ? * result);
int ?ns__pow( double ?a,? double ?b,? double ? * result);
二?多線程服務器關鍵代碼
#include?
#include?? " calc.nsmap "
#include?? " soapH.h "
/
///宏與全局變量的定義
#define ??BACKLOG?(100)??
#define ??MAX_THR?(10)???
#define ??MAX_QUEUE?(1000)
pthread_mutex_t?queue_cs;???????????????????????? // 隊列鎖
pthread_cond_t??queue_cv;?????????????????????????? // 條件變量
SOAP_SOCKET?????queue[MAX_QUEUE];??? // 數組隊列
int ???????????????????????????head? = 0 ,?tail? = 0 ;?????????? // 隊列頭隊列尾初始化?????????
//
//
void ? * ??????process_queue( void ? * );???????? // 線程入口函數
int ?????????enqueue(SOAP_SOCKET);?? // 入隊列函數
SOAP_SOCKET?dequeue( void );????????? // 出隊列函數
//
// 線程入口函數
void ? * ?process_queue( void ? * ?soap)
{
??struct?soap?*?tsoap?=?(struct?soap?*)soap;
??for(;;)
??{
????????tsoap->socket?=?dequeue();
????????if?(!soap_valid_socket(tsoap->socket))
???????{
?????????break;
????????}
????????soap_serve(tsoap);
????????soap_destroy(tsoap);
????????soap_end(tsoap);
??}
??return?NULL;
}
// 入隊列操作
int ?enqueue(SOAP_SOCKET?sock)
{
??int?status?=?SOAP_OK;
??int?next;
??pthread_mutex_lock(&queue_cs);
??next?=?tail?+1;
??if?(next?>=?MAX_QUEUE)?
????next?=?0;
??if?(next?==?head)?
??????status?=?SOAP_EOM;
??else
??{
????queue[tail]?=sock;
????tail?=?next;
??}
??pthread_cond_signal(&queue_cv);
??pthread_mutex_unlock(&queue_cs);
??return?status;
}
// 出隊列操作
SOAP_SOCKET?dequeue()
{
??SOAP_SOCKET?sock;
??pthread_mutex_lock(&queue_cs);
???while?(head?==?tail?)
???{
??????????pthread_cond_wait(&queue_cv,&queue_cs);
???}
??sock?=?queue[head++];
??if?(head?>=?MAX_QUEUE)
????????{
????head?=0;
??}
??pthread_mutex_unlock(&queue_cs);
??return?sock;
}
//具體服務方法////
// 加法的實現
int ?ns__add( struct ?soap? * soap,? double ?a,? double ?b,? double ? * result)
{
??????*result?=?a?+?b;
??????return?SOAP_OK;
} ?
// 減法的實現
int ?ns__sub( struct ?soap? * soap,? double ?a,? double ?b,? double ? * result)
{?
?????*result?=?a?-?b;
?????return?SOAP_OK;
} ?
// 乘法的實現
int ?ns__mul( struct ?soap? * soap,? double ?a,? double ?b,? double ? * result)
{?
?????*result?=?a?*?b;
?????return?SOAP_OK;
} ?
// 除法的實現
int ?ns__div( struct ?soap? * soap,? double ?a,? double ?b,? double ? * result)
{?
???if?(b)
???????*result?=?a?/?b;
???else
??{
?????????char?*s?=?(char*)soap_malloc(soap,?1024);
?????????sprintf(s,?"Can't">http://tempuri.org/">Can't?divide?%f?by?%f",?a,?b);
?????????return?soap_sender_fault(soap,?"Division?by?zero",?s);
??}
??return?SOAP_OK;
} ?
// 乘方的實現
int ?ns__pow( struct ?soap? * soap,? double ?a,? double ?b,? double ? * result)
{?
??*result?=?pow(a,?b);
??if?(soap_errno?==?EDOM)?/*?soap_errno?和errorno類似,?但是和widnows兼容?*/
??{?
????char?*s?=?(char*)soap_malloc(soap,?1024);
????sprintf(s,?"Can't?take?the?power?of?%f?to??%f",?a,?b);
????sprintf(s,?"Can't">http://tempuri.org/">Can't?take?power?of?%f?to?%f",?a,?b);
????return?soap_sender_fault(soap,?"Power?function?domain?error",?s);
??}
??return?SOAP_OK;
} ?
//
// 主函數
int ?main( int ?argc, char ? ** ?argv)
{
??struct?soap?ServerSoap;
?????//初始話運行時環境
????soap_init(&ServerSoap);
????//如果沒有參數，當作CGI程序處理
????if?(argc?<2)?
????{???????
???????????//CGI?風格服務請求，單線程
??????????soap_serve(&ServerSoap);
??????????//清除序列化的類的實例
?????????soap_destroy(&ServerSoap);
?????????//清除序列化的數據
????????soap_end(&ServerSoap);?????
???}else
???{
?????struct?soap?*?soap_thr[MAX_THR];
?????pthread_t?tid[MAX_THR];
?????int?i,port?=?atoi(argv[1]);
?????SOAP_SOCKET?m,s;
??????//鎖和條件變量初始化
?????pthread_mutex_init(&queue_cs,NULL);
?????pthread_cond_init(&queue_cv,NULL);
?????//綁定服務端口
????m?=?soap_bind(&ServerSoap,NULL,port,BACKLOG);
????//循環直至服務套接字合法
????while?(!soap_valid_socket(m))
???{
????????????????fprintf(stderr,"Bind?port?error!?");
????????????????m?=?soap_bind(&ServerSoap,NULL,port,BACKLOG);
????}
????fprintf(stderr,"socket?connection?successful?%d?",m);
????????????????
?????//生成服務線程
????for(i?=?0;?i?<MAX_THR;?i++)
???{
??????soap_thr[i]?=?soap_copy(&ServerSoap);
??????fprintf(stderr,"Starting?thread?%d?",i);
??????pthread_create(&tid[i],NULL,(void*(*)(void*))process_queue,(void*)soap_thr[i]);
????}
????????????????
????for(;;)
????{
??????//接受客戶端的連接
??????s?=?soap_accept(&ServerSoap);
??????if?(!soap_valid_socket(s))?
??????{
????????if?(ServerSoap.errnum)?
????????????????????????????????{
??????????soap_print_fault(&ServerSoap,stderr);
??????????continue;
????????}else
????????{
??????????fprintf(stderr,"Server?timed?out?");
??????????break;
????????}
??????}
???????//客戶端的IP地址
??????fprintf(stderr,"Accepted?connection?from?IP=?%d.%d.%d.%d?socket?=?%d?",
???????????????????????????????((ServerSoap.ip)>>24)&0xFF,((ServerSoap.ip)>>16)&0xFF,((ServerSoap.ip)>>8)&0xFF,(ServerSoap.ip)&0xFF,(ServerSoap.socket));
??????//請求的套接字進入隊列，如果隊列已滿則循環等待
???????while(enqueue(s)?==?SOAP_EOM)
????????????????Sleep(1000);
????}
????//服務結束后的清理工作
????for(i?=?0;?i?<?MAX_THR;?i++)
????{
??????while?(enqueue(SOAP_INVALID_SOCKET)?==?SOAP_EOM)?
???????{
???????????Sleep(1000);
??????}
????}
????for(i=0;?i<?MAX_THR;?i++)
????{
??????fprintf(stderr,"Waiting?for?thread?%d?to?terminate?..",i);
??????pthread_join(tid[i],NULL);
??????fprintf(stderr,"terminated?");
??????soap_done(soap_thr[i]);
??????free(soap_thr[i]);
????}
????pthread_mutex_destroy(&queue_cs);
????pthread_cond_destroy(&queue_cv);
??}
????//分離運行時的環境
??soap_done(&ServerSoap);
??return?0;
}
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