使用Node.js 創建WebService服務端

使用Node.js 創建WebService服務端

最近幾天任務是用node.js去對接第三方的OA系統，對方OA系統屬於太古老的代碼了，還在使用WebService，用node.js調用WebService 很簡單，用soap模塊調用即可，網上已經有很多教程
但是當Node.js提供一個接口，供對方的webService調用，在網上找到對應教程。

• 難點：如何解析對方用soap調用該接口，獲取參數，
• 方式1：可以自己實現xml的解析
• 方式2：調用soap模塊

在實驗多次之後終於解決該問題

1. npm install soap
2. 閱讀官方test代碼。server-test

// 服務端代碼：
var soap = require('soap');
var fs = require('fs'),
    http = require('http'),
    lastReqAddress;

var test = {};
test.wsdl = fs.readFileSync('stockquote.wsdl', 'utf8');
test.server = null;
test.service = {
    StockQuoteService: {
        StockQuotePort: {
            GetLastTradePrice: function(args, cb, soapHeader) {
                if (soapHeader)
                    return { price: soapHeader.SomeToken };
                if (args.tickerSymbol === 'trigger error') {
                    throw new Error('triggered server error');
                } else if (args.tickerSymbol === 'Async') {
                    return cb({ price: 19.56 });
                } else if (args.tickerSymbol === 'Promise Error') {
                    return new Promise((resolve, reject) => {
                        reject(new Error('triggered server error'));
                    });
                } else if (args.tickerSymbol === 'Promise') {
                    return new Promise((resolve) => {
                        resolve({ price: 13.76 });
                    });
                } else if (args.tickerSymbol === 'SOAP Fault v1.2') {
                    throw {
                        Fault: {
                            Code: {
                                Value: "soap:Sender",
                                Subcode: { value: "rpc:BadArguments" }
                            },
                            Reason: { Text: "Processing Error" }
                        }
                    };
                } else if (args.tickerSymbol === 'SOAP Fault v1.1') {
                    throw {
                        Fault: {
                            faultcode: "soap:Client.BadArguments",
                            faultstring: "Error while processing arguments"
                        }
                    };
                } else {
                    return { price: 19.56 };
                }
            },

            SetTradePrice: function(args, cb, soapHeader) {
            },

            IsValidPrice: function(args, cb, soapHeader, req) {
                lastReqAddress = req.connection.remoteAddress;

                var validationError = {
                    Fault: {
                        Code: {
                            Value: "soap:Sender",
                            Subcode: { value: "rpc:BadArguments" }
                        },
                        Reason: { Text: "Processing Error" },
                        statusCode: 500
                    }
                };

                var isValidPrice = function() {
                    var price = args.price;
                    if(isNaN(price) || (price === ' ')) {
                        return cb(validationError);
                    }

                    price = parseInt(price, 10);
                    var validPrice = (price > 0 && price < Math.pow(10, 5));
                    return cb(null, { valid: validPrice });
                };

                setTimeout(isValidPrice, 10);
            }
        }
    }
};

test.server = http.createServer(function(request,response) {
    response.end('404: Not Found: ' + request.url);
});

test.server.listen(15099, null, null, function() {
    test.soapServer = soap.listen(test.server, '/stockquote', test.service, test.wsdl);
    test.baseUrl = 'http://' + test.server.address().address + ":" + test.server.address().port;
    if (test.server.address().address === '0.0.0.0' || test.server.address().address === '::') {
        test.baseUrl = 'http://127.0.0.1:' + test.server.address().port;
    }
})

對應的wsdl代碼，我是直接複製官方的wsdl，

<?xml version="1.0"?>

<wsdl:definitions name="StockQuote"
             targetNamespace="http://example.com/stockquote.wsdl"
             xmlns:tns="http://example.com/stockquote.wsdl"
             xmlns:xsd1="http://example.com/stockquote.xsd"
             xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
             xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">

    <wsdl:types>
       <xsd:schema targetNamespace="http://example.com/stockquote.xsd" xmlns:xsd="http://www.w3.org/2000/10/XMLSchema">
           <xsd:element name="TradePriceRequest">
              <xsd:complexType>
                  <xsd:all>
                      <xsd:element name="tickerSymbol" type="string"/>
                  </xsd:all>
              </xsd:complexType>
           </xsd:element>
           <xsd:element name="TradePrice">
              <xsd:complexType>
                  <xsd:all>
                      <xsd:element name="price" type="float"/>
                  </xsd:all>
              </xsd:complexType>
           </xsd:element>
           <xsd:element name="TradePriceSubmit">
               <xsd:complexType>
                   <xsd:all>
                       <xsd:element name="tickerSymbol" type="string"/>
                       <xsd:element name="price" type="float"/>
                   </xsd:all>
               </xsd:complexType>
           </xsd:element>
           <xsd:element name="valid" type="boolean"/>
       </xsd:schema>
    </wsdl:types>

    <wsdl:message name="GetLastTradePriceInput">
        <wsdl:part name="body" element="xsd1:TradePriceRequest"/>
    </wsdl:message>

    <wsdl:message name="GetLastTradePriceOutput">
        <wsdl:part name="body" element="xsd1:TradePrice"/>
    </wsdl:message>

    <wsdl:message name="SetTradePriceInput">
        <wsdl:part name="body" element="xsd1:TradePriceSubmit"/>
    </wsdl:message>

    <wsdl:message name="IsValidPriceInput">
        <wsdl:part name="body" element="xsd1:TradePrice"/>
    </wsdl:message>

    <wsdl:message name="IsValidPriceOutput">
        <wsdl:part name="body" element="xsd1:valid"/>
    </wsdl:message>

    <wsdl:portType name="StockQuotePortType">
        <wsdl:operation name="GetLastTradePrice">
           <wsdl:input message="tns:GetLastTradePriceInput"/>
           <wsdl:output message="tns:GetLastTradePriceOutput"/>
        </wsdl:operation>
        <wsdl:operation name="SetTradePrice">
            <wsdl:input message="tns:SetTradePriceInput"/>
        </wsdl:operation>
        <wsdl:operation name="IsValidPrice">
            <wsdl:input message="tns:IsValidPriceInput"/>
            <wsdl:output message="tns:IsValidPriceOutput"/>
        </wsdl:operation>
    </wsdl:portType>

    <wsdl:binding name="StockQuoteSoapBinding" type="tns:StockQuotePortType">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <wsdl:operation name="GetLastTradePrice">
           <soap:operation soapAction="http://example.com/GetLastTradePrice"/>
           <wsdl:input>
               <soap:body use="literal"/>
           </wsdl:input>
           <wsdl:output>
               <soap:body use="literal"/>
           </wsdl:output>
        </wsdl:operation>
        <wsdl:operation name="SetTradePrice">
            <soap:operation soapAction="http://example.com/SetTradePrice"/>
            <wsdl:input>
                <soap:body use="literal"/>
            </wsdl:input>
        </wsdl:operation>
        <wsdl:operation name="IsValidPrice">
            <soap:operation soapAction="http://example.com/IsValidPrice"/>
            <wsdl:input>
                <soap:body use="literal"/>
            </wsdl:input>
        </wsdl:operation>
    </wsdl:binding>

    <wsdl:service name="StockQuoteService">
        <wsdl:port name="StockQuotePort" binding="tns:StockQuoteSoapBinding">
           <soap:address location="http://localhost:15099/stockquote"/>
        </wsdl:port>
    </wsdl:service>

</wsdl:definitions>

用戶端調用

var soap = require('soap');
var url = 'http://127.0.0.1:15099/stockquote?wsdl';
//使用soap，根據wsdl地址創建客戶端
soap.createClient(url,function(err,client){
    console.log(client)
    if(err){
        console.log(err);
    }
    //返回一個客戶端，並且傳參調用Java的接口，接收返回的數據
    client.GetLastTradePrice({ tickerSymbol: 'Async'},function(error,result){
        //打印接收到的數據
        console.log(result);
    });
})