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使用gSOAP開發實例(2) 股票信息服務端程序

Posted on 2010-08-14 23:46 roy 閱讀(2263) 評論(0) 編輯收藏引用所屬分類: C/C++

電信provisioning系統中，常常需要與遠程服務器實時交換一些數據，以完成用戶的請求。由于簡單對象訪問協議（Simple Object Access Protocol, SOAP）的流行，許多涉及到第三方的應用，我們一般都比較樂意使用SOAP來開發。不過，由于可能涉及到公司的機密，本系列教程的開發實例盡量采用在網上已經公開的Web Service資源。

上文已經交待了gSOAP在Linux環境下的編譯方法和客戶端的實例程序，本文繼續講解其服務端程序的開發。由于不可能獲得真正的數據庫內容，我們設定的目標是，所有返回的內容都是客戶端傳入的股票代碼。

首先，在gsoap-2.7/gsoap/wsdl/下創建一個stock_server目錄
-bash-3.2$ mkdir -p stock_server

改變當前路徑為stock_server
-bash-3.2$ cd stock_server

仍然使用wsdl2h生成基于純C代碼的stock.h
-bash-3.2$ ../wsdl2h -c -o stock.h http://webservice.webxml.com.cn/WebServices/ChinaStockWebService.asmx?wsdl

然后，生成服務端存根程序，并且不生成xml文件和soapServerLib.c
-bash-3.2$ ../../bin/linux386/soapcpp2 -S -L -x stock.h

** The gSOAP code generator for C and C++, soapcpp2 release 2.7.17
** Copyright (C) 2000-2010, Robert van Engelen, Genivia Inc.
** All Rights Reserved. This product is provided "as is", without any warranty.
** The soapcpp2 tool is released under one of the following three licenses:
** GPL, the gSOAP public license, or the commercial license by Genivia Inc.

Saving soapStub.h annotated copy of the input declarations
Saving soapH.h interface declarations
Saving soapC.c XML serializers
Saving soapServer.c server request dispatcher
Using ns2 service name: ChinaStockWebServiceSoap
Using ns2 service style: document
Using ns2 service encoding: literal
Using ns2 service location: http://webservice.webxml.com.cn/WebServices/ChinaStockWebService.asmx
Using ns2 schema namespace: http://WebXml.com.cn/ChinaStockWebServiceSoap
Saving ChinaStockWebServiceSoap.nsmap namespace mapping table
Using ns3 service name: ChinaStockWebServiceSoap12
Using ns3 service style: document
Using ns3 service encoding: literal
Using ns3 service location: http://webservice.webxml.com.cn/WebServices/ChinaStockWebService.asmx
Using ns3 schema namespace: http://WebXml.com.cn/ChinaStockWebServiceSoap12
Saving ChinaStockWebServiceSoap12.nsmap namespace mapping table

Compilation successful

服務端的主程序稍微比客戶端復雜些，因為還要處理客戶端的其他請求，至少要有其函數體，否則編譯時會報錯。

#include "soapH.h"
#include "ChinaStockWebServiceSoap12.nsmap"

int main(int argc, char **argv) {
    if ( argc != 2 ) {
        printf("Usage: %s port\n", argv[0]);
        exit(-1);
    }
    int port = atol(argv[1]);

    struct soap soap;
    soap_init(&soap);
    int m, s;
    if ( (m = soap_bind(&soap, NULL, port, 100)) < 0 ) {
        soap_print_fault(&soap, stderr);
    }
    else {
        printf("Socket connect successfully: master socket = %d\n", m);
        int i = 0;
        while ( 1 ) {
            if ( (s = soap_accept(&soap)) < 0 ) {
                soap_print_fault(&soap, stderr);
                break;
            }
            printf("Connection %d accepted from IP = %d.%d.%d.%d, slave socket = %d\n", ++i, (soap.ip >> 24) & 0xff, (soap.ip >> 16) & 0xff, (soap.ip >> 8) & 0xff, soap.ip & 0xff, s);
            if ( soap_serve(&soap) != SOAP_OK ) {
                soap_print_fault(&soap, stderr);
                break;
            }
            soap_end(&soap);
        }
    }
    soap_done(&soap);
}

int __ns3__getStockInfoByCode(
    struct soap *soap,
    struct _ns1__getStockInfoByCode *request,
    struct _ns1__getStockInfoByCodeResponse *response) {
    int element_counter = 25;
    response->getStockInfoByCodeResult = (struct ns1__ArrayOfString *) malloc(sizeof(struct ns1__ArrayOfString));
    response->getStockInfoByCodeResult->__sizestring = element_counter;
    response->getStockInfoByCodeResult->string = (char **) malloc(sizeof(char *) * element_counter);
    int i = 0;
    for ( i = 0; i < element_counter; i++ ) {
        response->getStockInfoByCodeResult->string[i] = (char *) malloc(sizeof(char) * 32);
        strcpy(response->getStockInfoByCodeResult->string[i], request->theStockCode);
    }
    return SOAP_OK;
}

int __ns3__getStockImage_USCOREkByteByCode(
    struct soap *soap,
    struct _ns1__getStockImage_USCOREkByteByCode *request,
    struct _ns1__getStockImage_USCOREkByteByCodeResponse *response) {
    return SOAP_OK;
}

int __ns3__getStockImage_USCOREkByCode(
    struct soap *soap,
    struct _ns1__getStockImage_USCOREkByCode *request,
    struct _ns1__getStockImage_USCOREkByCodeResponse *response) {
    return SOAP_OK;
}

int __ns3__getStockImageByteByCode(
    struct soap *soap,
    struct _ns1__getStockImageByteByCode *request,
    struct _ns1__getStockImageByteByCodeResponse *response) {
    return SOAP_OK;
}

int __ns3__getStockImageByCode(
    struct soap *soap,
    struct _ns1__getStockImageByCode *request,
    struct _ns1__getStockImageByCodeResponse *response) {
    return SOAP_OK;
}

int __ns2__getStockInfoByCode(
    struct soap *soap,
    struct _ns1__getStockInfoByCode *request,
    struct _ns1__getStockInfoByCodeResponse *response) {
    int element_counter = 25;
    response->getStockInfoByCodeResult = (struct ns1__ArrayOfString *) malloc(sizeof(struct ns1__ArrayOfString));
    response->getStockInfoByCodeResult->__sizestring = element_counter;
    response->getStockInfoByCodeResult->string = (char **) malloc(sizeof(char *) * element_counter);
    int i = 0;
    for ( i = 0; i < element_counter; i++ ) {
        response->getStockInfoByCodeResult->string[i] = (char *) malloc(sizeof(char) * 32);
        strcpy(response->getStockInfoByCodeResult->string[i], request->theStockCode);
    }
    return SOAP_OK;
}

int __ns2__getStockImage_USCOREkByteByCode(
    struct soap *soap,
    struct _ns1__getStockImage_USCOREkByteByCode *request,
    struct _ns1__getStockImage_USCOREkByteByCodeResponse *response) {
    return SOAP_OK;
}

int __ns2__getStockImage_USCOREkByCode(
    struct soap *soap,
    struct _ns1__getStockImage_USCOREkByCode *request,
    struct _ns1__getStockImage_USCOREkByCodeResponse *response) {
    return SOAP_OK;
}

int __ns2__getStockImageByteByCode(
    struct soap *soap,
    struct _ns1__getStockImageByteByCode *request,
    struct _ns1__getStockImageByteByCodeResponse *response) {
    return SOAP_OK;
}

int __ns2__getStockImageByCode(
    struct soap *soap,
    struct _ns1__getStockImageByCode *request,
    struct _ns1__getStockImageByCodeResponse *response) {
    return SOAP_OK;
}

值得注意的是，如果項目中存在多個name space，最好把全部name space的相關方法都進行編碼，否則可能出現意想不到的錯誤：客戶端明明是調用ns3的方法，但是服務端卻使用了ns2的方法來提供服務。這一點我也比較費解，可能與wsdl本身的寫法有關。

上述服務端程序的編譯命令是

gcc -O2 -o stock_server stock_server.c soapC.c soapServer.c ../../stdsoap2.c -I../.. -L../.. -lgsoap

同時，要把上文的客戶端程序修改一下，支持指定的end point，不指定end point再取默認的end point

#include "soapH.h"
#include "ChinaStockWebServiceSoap12.nsmap"

int main(int argc, char **argv) {
    if ( argc != 2 && argc != 3 ) {
        printf("Usage: %s stock_code [end_point]\n", argv[0]);
        exit(-1);
    }

    struct soap soap;
    soap_init(&soap);
    soap_set_mode(&soap, SOAP_C_UTFSTRING);
    struct _ns1__getStockInfoByCode request;
    struct _ns1__getStockInfoByCodeResponse response;

    request.theStockCode = argv[1];
    char *endpoint = NULL;
    if ( argc == 3 )
        endpoint = argv[2];
    if ( soap_call___ns3__getStockInfoByCode(&soap, endpoint, NULL, &request, &response) == SOAP_OK ) {
        int element_counter = response.getStockInfoByCodeResult->__sizestring;
        int i = 0;
        for ( i = 0; i < element_counter; i++ ) {
            switch ( i ) {
                case 0  : printf("Stock code        : "); break;
                case 1  : printf("Stock name        : "); break;
                case 2  : printf("Timestamp         : "); break;
                case 3  : printf("Latest price      : "); break;
                case 4  : printf("Closing price T-1 : "); break;
                case 5  : printf("Opening price     : "); break;
                case 6  : printf("Ups and downs     : "); break;
                case 7  : printf("Mininum price     : "); break;
                case 8  : printf("Maxinum price     : "); break;
                case 9  : printf("Amount of up/down : "); break;
                case 10 : printf("Trading volume    : "); break;
                case 11 : printf("Trading amount    : "); break;
                case 12 : printf("Buy price         : "); break;
                case 13 : printf("Sell price        : "); break;
                case 14 : printf("Agency trans      : "); break;
                case 15 : printf("Buy  1            : "); break;
                case 16 : printf("Buy  2            : "); break;
                case 17 : printf("Buy  3            : "); break;
                case 18 : printf("Buy  4            : "); break;
                case 19 : printf("Buy  5            : "); break;
                case 20 : printf("Sell 1            : "); break;
                case 21 : printf("Sell 2            : "); break;
                case 22 : printf("Sell 3            : "); break;
                case 23 : printf("Sell 4            : "); break;
                case 24 : printf("Sell 5            : "); break;
                default : break;
            }
            printf("%s\n", response.getStockInfoByCodeResult->string[i]);
        }
    }
    else {
        soap_print_fault(&soap, stderr);
    }

    soap_destroy(&soap);
    soap_end(&soap);
    soap_done(&soap);
    return 0;
}
使服務端程序在某一高位端口下運行，比如
-bash-3.2$ ./stock_server 6883
Socket connect successfully: master socket = 3

另起一個窗口執行客戶端程序，并且指定end point
-bash-3.2$ ./stock sh600000 http://localhost:6883
Stock code : sh600000
Stock name : sh600000
Timestamp : sh600000
Latest price : sh600000
Closing price T-1 : sh600000
Opening price : sh600000
Ups and downs : sh600000
Mininum price : sh600000
Maxinum price : sh600000
Amount of up/down : sh600000
Trading volume : sh600000
Trading amount : sh600000
Buy price : sh600000
Sell price : sh600000
Agency trans : sh600000
Buy 1 : sh600000
Buy 2 : sh600000
Buy 3 : sh600000
Buy 4 : sh600000
Buy 5 : sh600000
Sell 1 : sh600000
Sell 2 : sh600000
Sell 3 : sh600000
Sell 4 : sh600000
Sell 5 : sh600000

成功！

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