WebService Raw Client
抛弃各种平台所提供的标准或框架(如JAX-WS,Axis,Spring-WS) ,我们回到最原始的WebService技术。我们只需要操控SOAP协议数据,用HTTP的方式传送于client和server之间,也可以享受到WebService所提供的服务。只是比较麻烦。 UDDI首先需要寻找我们需要的WebService服务. 对于提供商来说,要想让别人能过发现自己提供的服务,就需要将自己的服务注册到某一类公共的发布栏中去。这一系列的标准,被称为UDDI。我们可以通过在UDDI目录中搜索,得到我们想要的服务。 这里,我们使用一个全球天气预报的WebService:?http://www.webservicex.net/globalweather.asmx?WSDL WSDLWSDL的结构示意图如下: 现在,我们要对天气预报的WSDL进行分析。 查看WebService的描述文件,看看提供了什么样子的接口。 首先查看WSDL提供的service: 从上面可以看出,WSDL中,Service提供了4个port,每个port声明一个binding与address的绑定。注意,不同的协议在展示地址的时候所用的标签命名空间也不同,例如soap,soap12,http. 我们打算使用Soap12协议的port,于是我们将查看binding="tns:GlobalWeatherSoap12"的定义。 通过上面的binding定义,我们看到,此binding实现了PortType tns:GlobalWeatherSoap的operation,并声明使用soap12协议。在Operation的实现中,如何组装input和output。从上面的代码,我们可以得出 Request的请求应该是PortType GlobalWeatherSoap的input: http://www.webservicex.net/globalweather.asmx?HTTP/1.1 Content-Type:?application/soap+xml;?charset=utf-8 Content-Length:?length <?xml?version="1.0"?encoding="utf-8"?> <soap12:Envelope?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"?xmlns:xsd="http://www.w3.org/2001/XMLSchema"?xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> ??<soap12:Body> ??</soap12:Body> </soap12:Envelope> Response的响应应该是PortType GloableWeatherSoap的output: <?xml?version="1.0"?encoding="utf-8"?> <soap12:Envelope?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"?xmlns:xsd="http://www.w3.org/2001/XMLSchema"?xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> ??<soap12:Body> ??</soap12:Body> </soap12:Envelope> 接下来,我们来组装Request Body . 依照PortType GloableWeatherSoap的定义: Operation GetWeather的input是Message GetWeatherSoapIn,而output是Message GetWeatherSoapOut. 找到Message的定义 两个Message均引用了XSD Type,一个是GetWeather,另一个是GetWeatherResponse,找到两个type的定义: 这时候,我们可以根据上面对Input Type和Output Type的定义,可以填充request和response的soap:body了。 最终的请求应该为: http://www.webservicex.net/globalweather.asmx?HTTP/1.1 Content-Type:?application/soap+xml;?charset=utf-8 Content-Length:?length <?xml?version="1.0"?encoding="utf-8"?> <soap12:Envelope?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"?xmlns:xsd="http://www.w3.org/2001/XMLSchema"?xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> ??<soap12:Body> ????<GetWeather?xmlns="http://www.webserviceX.NET"> ??????<CityName>shanghai</CityName> ??????<CountryName>China</CountryName> ????</GetWeather> ??</soap12:Body> </soap12:Envelope> 最终的响应应该为: <?xml?version="1.0"?encoding="utf-8"?> <soap12:Envelope?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"?xmlns:xsd="http://www.w3.org/2001/XMLSchema"?xmlns:soap12="http://www.w3.org/2003/05/soap-envelope"> ??<soap12:Body> ????<GetWeatherResponse?xmlns="http://www.webserviceX.NET"> ??????<GetWeatherResult>text</GetWeatherResult> ????</GetWeatherResponse> ??</soap12:Body> </soap12:Envelope> Fiddler接下来,我们使用Fiddler来测试一下上面所有的推断。 打开Fiddler,在Composer tab中,贴入我们的Request. 点击execute以后,到Inspectors tab里面,查看response: Java实现接下来,我们使用Java的net包和JAXP来实现webservice的调用。 public?class?App?{ ????public?static?void?main(?String[]?args?)?throws?IOException,?ParserConfigurationException,?SAXException?{ ????????StringBuilder?sb?=?new?StringBuilder(); ????????sb.append(?"<?xml?version="1.0"?encoding="utf-8"?>???????????????????????????????????") ??????????.append(?"??<soap12:Envelope?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"???") ??????????.append(?"???????????????????xmlns:xsd="http://www.w3.org/2001/XMLSchema"????????????") ??????????.append(?"???????????????????xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">?") ??????????.append(?"????<soap12:Body>????????????????????????????????????????????????????????????") ??????????.append(?"??????<GetWeather?xmlns="http://www.webserviceX.NET">??????????????????????") ??????????.append(?"????????<CityName>shanghai</CityName>????????????????????????????????????????") ??????????.append(?"????????<CountryName>China</CountryName>?????????????????????????????????????") ??????????.append(?"??????</GetWeather>??????????????????????????????????????????????????????????") ??????????.append(?"????</soap12:Body>???????????????????????????????????????????????????????????") ??????????.append(?"??</soap12:Envelope>?????????????????????????????????????????????????????????"); ???????? ???????URL?url?=?new?URL("http://www.webservicex.net/globalweather.asmx"); ???????HttpURLConnection?httpConn?=?(HttpURLConnection)?url.openConnection(); ???????httpConn.setRequestProperty("Content-Length",?String.valueOf(sb.length())); ???????httpConn.setRequestProperty("Content-Type",?"application/soap+xml;?charset=utf-8"); ???????httpConn.setRequestMethod("POST"); ???????httpConn.setDoOutput(true); ???????httpConn.setDoInput(true); ???????OutputStream?out?=?httpConn.getOutputStream(); ???????out.write(sb.toString().getBytes()); ???????out.close(); ???????? ???????DocumentBuilder?builder?=?DocumentBuilderFactory.newInstance().newDocumentBuilder();? ???????Document?doc?=?builder.parse(httpConn.getInputStream()); ???????String?body?=?doc.getElementsByTagName("GetWeatherResult").item(0).getChildNodes().item(0).getNodeValue(); ???????System.out.println(body); ????} } 最后输出为: <?xml?version="1.0"?encoding="utf-16"?> <CurrentWeather> ??<Location>Shanghai?/?Hongqiao,?China?(ZSSS)?31-10N?121-26E?3M</Location> ??<Time>Apr?17,?2014?-?05:30?AM?EDT?/?2014.04.17?0930?UTC</Time> ??<Wind>?from?the?NNW?(340?degrees)?at?9?MPH?(8?KT)?(direction?variable):0</Wind> ??<Visibility>?1?mile(s):0</Visibility> ??<Temperature>?66?F?(19?C)</Temperature> ??<DewPoint>?59?F?(15?C)</DewPoint> ??<RelativeHumidity>?77%</RelativeHumidity> ??<Pressure>?29.83?in.?Hg?(1010?hPa)</Pressure> ??<Status>Success</Status> </CurrentWeather> (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |