Exchange 网络服务错误：请求失败。 空

Question

我正在使用 EWS-java-api 访问 Outlook 电子邮件并阅读电子邮件。 我遇到以下错误：

microsoft.exchange.webservices.data.core.exception.service.remote.ServiceRequestException: The request failed. null

这是我的代码：

    import microsoft.exchange.webservices.data.core.ExchangeService;
    import microsoft.exchange.webservices.data.core.enumeration.misc.ExchangeVersion;
    import microsoft.exchange.webservices.data.core.enumeration.property.WellKnownFolderName;
    import microsoft.exchange.webservices.data.core.service.item.Item;
    import microsoft.exchange.webservices.data.credential.WebCredentials;
    import microsoft.exchange.webservices.data.search.FindItemsResults;
    import microsoft.exchange.webservices.data.search.ItemView;

    import microsoft.exchange.webservices.data.search.filter.SearchFilter;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.Properties;

    Properties properties = new Properties();
    properties.put("javax.net.ssl.trustStore", "C:/Users/<path to java security>/cacerts" );
    properties.put("javax.net.ssl.trustStorePassword","changeit");
    System.setProperties(properties);

    service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);

    def usr = "abc@mycompany.ca";
    def pwd = "password";
    def url = "https://mycompanydomain/ews/exchange.asmx";
    service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
    credentials = new WebCredentials(usr, pwd);

    service.setCredentials(credentials);

    try {
        service.setUrl(new URI(url));

        service.setTraceEnabled(true);
        Calendar cal = Calendar.getInstance();
        cal.roll(Calendar.MONTH, false);
        view = new ItemView(50);

        findResults = service.findItems(WellKnownFolderName.Inbox, view);
        for(item in findResults.getItems()) {
            println("\n + email is: "+item+ "\n") ;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

这是完整的堆栈跟踪：

15:32:13 [INFO] ScriptProcessor starts processing...
microsoft.exchange.webservices.data.core.exception.service.remote.ServiceRequestException: The request failed. null
15:32:14 [INFO] ScriptProcessor processor executed in 889ms.
    at microsoft.exchange.webservices.data.core.request.SimpleServiceRequestBase.internalExecute(SimpleServiceRequestBase.java:74)
    at microsoft.exchange.webservices.data.core.request.MultiResponseServiceRequest.execute(MultiResponseServiceRequest.java:158)
    at microsoft.exchange.webservices.data.core.ExchangeService.findItems(ExchangeService.java:985)
    at microsoft.exchange.webservices.data.core.ExchangeService.findItems(ExchangeService.java:1028)
    at microsoft.exchange.webservices.data.core.ExchangeService.findItems(ExchangeService.java:1104)
    at microsoft.exchange.webservices.data.core.ExchangeService$findItems$0.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
    at Script1.run(Script1.groovy:54)
    at groovy.lang.GroovyShell.evaluate(GroovyShell.java:585)
    at groovy.lang.GroovyShell.evaluate(GroovyShell.java:623)
    at groovy.lang.GroovyShell.evaluate(GroovyShell.java:594)
    at org.webharvest.runtime.scripting.GroovyScriptEngine.eval(GroovyScriptEngine.java:136)
    at org.webharvest.runtime.processors.ScriptProcessor.execute(ScriptProcessor.java:74)
    at org.webharvest.runtime.processors.BaseProcessor.run(BaseProcessor.java:127)
    at org.webharvest.runtime.Scraper.execute(Scraper.java:169)
    at org.webharvest.runtime.Scraper.execute(Scraper.java:182)
    at com.freedomoss.crowdcontrol.webharvest.executor.LocalWebharvestTaskExecutor.executeWebHarvestTask(LocalWebharvestTaskExecutor.java:182)
    at com.workfusion.studio.launch.SingleThreadWebHarvestProcess.processTaskInputs(SingleThreadWebHarvestProcess.java:77)
    at com.workfusion.studio.launch.SingleThreadWebHarvestProcess.start(SingleThreadWebHarvestProcess.java:46)
    at com.workfusion.studio.launch.WebHarvestMainLauncher.launch(WebHarvestMainLauncher.java:79)
    at com.workfusion.studio.launch.WebHarvestMainLauncher.main(WebHarvestMainLauncher.java:121)
Caused by: java.lang.NullPointerException
    at com.ctc.wstx.sw.BaseStreamWriter.writeCharacters(BaseStreamWriter.java:447)
    at microsoft.exchange.webservices.data.core.EwsUtilities.formatLogMessage(EwsUtilities.java:558)
    at microsoft.exchange.webservices.data.core.ExchangeServiceBase.traceHttpRequestHeaders(ExchangeServiceBase.java:515)
    at microsoft.exchange.webservices.data.core.request.ServiceRequestBase.buildEwsHttpWebRequest(ServiceRequestBase.java:686)
    at microsoft.exchange.webservices.data.core.request.ServiceRequestBase.buildEwsHttpWebRequest(ServiceRequestBase.java:665)
    at microsoft.exchange.webservices.data.core.request.ServiceRequestBase.validateAndEmitRequest(ServiceRequestBase.java:635)
    at microsoft.exchange.webservices.data.core.request.SimpleServiceRequestBase.internalExecute(SimpleServiceRequestBase.java:62)
    ... 22 more

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非常感谢任何帮助。

Answer 1

我在设置服务 url 时遇到了同样的问题，所以我首先通过设置凭据和设置自动发现来完成

发生这种情况时，系统会提示用户接受或不接受重定向，而不是失败。 该功能需要在 autodiscoverRedirectionUrlValidationCallback 方法中实现。 在下面的示例中，它只检查重定向 url 是否以“https://”开头。 为了实现这一点

static class RedirectionUrlCallback implements IAutodiscoverRedirectionUrl {
        public boolean autodiscoverRedirectionUrlValidationCallback(
                String redirectionUrl) {
            return redirectionUrl.toLowerCase().startsWith("https://");
        }
    }

现在

service.autodiscoverUrl("<your_email_address>", new RedirectionUrlCallback());

可以调用以安全的方式处理重定向。