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使用gSOAP開(kāi)發(fā)實(shí)例(2) 股票信息服務(wù)端程序

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

電信provisioning系統(tǒng)中，常常需要與遠(yuǎn)程服務(wù)器實(shí)時(shí)交換一些數(shù)據(jù)，以完成用戶(hù)的請(qǐng)求。由于簡(jiǎn)單對(duì)象訪(fǎng)問(wèn)協(xié)議（Simple Object Access Protocol, SOAP）的流行，許多涉及到第三方的應(yīng)用，我們一般都比較樂(lè)意使用SOAP來(lái)開(kāi)發(fā)。不過(guò)，由于可能涉及到公司的機(jī)密，本系列教程的開(kāi)發(fā)實(shí)例盡量采用在網(wǎng)上已經(jīng)公開(kāi)的Web Service資源。

上文已經(jīng)交待了gSOAP在Linux環(huán)境下的編譯方法和客戶(hù)端的實(shí)例程序，本文繼續(xù)講解其服務(wù)端程序的開(kāi)發(fā)。由于不可能獲得真正的數(shù)據(jù)庫(kù)內(nèi)容，我們?cè)O(shè)定的目標(biāo)是，所有返回的內(nèi)容都是客戶(hù)端傳入的股票代碼。

首先，在gsoap-2.7/gsoap/wsdl/下創(chuàng)建一個(gè)stock_server目錄
-bash-3.2$ mkdir -p stock_server

改變當(dāng)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(wù)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(wù)端的主程序稍微比客戶(hù)端復(fù)雜些，因?yàn)檫€要處理客戶(hù)端的其他請(qǐng)求，至少要有其函數(shù)體，否則編譯時(shí)會(huì)報(bào)錯(cuò)。

#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(xiàng)目中存在多個(gè)name space，最好把全部name space的相關(guān)方法都進(jìn)行編碼，否則可能出現(xiàn)意想不到的錯(cuò)誤：客戶(hù)端明明是調(diào)用ns3的方法，但是服務(wù)端卻使用了ns2的方法來(lái)提供服務(wù)。這一點(diǎn)我也比較費(fèi)解，可能與wsdl本身的寫(xiě)法有關(guān)。

上述服務(wù)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(shí)，要把上文的客戶(hù)端程序修改一下，支持指定的end point，不指定end point再取默認(rèn)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(wù)端程序在某一高位端口下運(yùn)行，比如
-bash-3.2$ ./stock_server 6883
Socket connect successfully: master socket = 3

另起一個(gè)窗口執(zhí)行客戶(hù)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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