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java - Mailgun Java API 发送 HTML 电子邮件

转载 作者：搜寻专家 更新时间：2023-10-31 22:53:48 24 4
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我想得到"html": "... HTML 页面的全部内容都在这里..." 在 Java 中使用 Unirest HTTP 与 MailGun API 通信。

到目前为止，我已经验证了我的域，通过 API 成功发送了一封电子邮件，并通过 Java 中的 API 成功发送了一封 HTML(基本)电子邮件。每当我尝试使用任何电子邮件模板时，我都无法发送电子邮件(通过 API，使用 Java)。我试图使用此处推荐的电子邮件模板:https://github.com/mailgun/transactional-email-templates/tree/master/templates .

我发送邮件的代码与文档一致

public static JsonNode sendSimpleMessage() throws UnirestException {
        HttpResponse<com.mashape.unirest.http.JsonNode> request = Unirest.post("https://api.mailgun.net/v3/sub.domain.com" + "/messages")
                .basicAuth("api",  API_KEY)
                .queryString("from", "name <test@domain.com>")
                .queryString("to", "myemail@gmail.com")
                .queryString("subject", "Great")
                .queryString("html", returnEmail())
                .asJson();

        return request.getBody();
    }

public static String returnEmail() {
        try {
            return StreamUtils.copyToString(new ClassPathResource("email.html").getInputStream(), Charset.defaultCharset());
        } catch (IOException e) {
            e.printStackTrace();
        }

        return "<html><strong>not today</strong></html>";
    }

并且 email.html 包含来自上述电子邮件 ( https://github.com/mailgun/transactional-email-templates/tree/master/templates ) 或任何 HTML 电子邮件的示例，因为没有工作。

我得到的错误是:

com.mashape.unirest.http.exceptions.UnirestException: java.lang.RuntimeException: java.lang.RuntimeException: org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1].

堆栈跟踪:

com.mashape.unirest.http.exceptions.UnirestException: java.lang.RuntimeException: java.lang.RuntimeException: org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1]
at com.mashape.unirest.http.HttpClientHelper.request(HttpClientHelper.java:143)
at com.mashape.unirest.request.BaseRequest.asJson(BaseRequest.java:68)
at com..application.ApplicationController.sendSimpleMessage(ApplicationController.java:78)
at com.application.ApplicationController.create(ApplicationController.java:61)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1]
    at com.mashape.unirest.http.HttpResponse.<init>(HttpResponse.java:106)
    at com.mashape.unirest.http.HttpClientHelper.request(HttpClientHelper.java:139)
    ... 57 more
Caused by: java.lang.RuntimeException: org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1]
    at com.mashape.unirest.http.JsonNode.<init>(JsonNode.java:51)
    at com.mashape.unirest.http.HttpResponse.<init>(HttpResponse.java:95)
    ... 58 more
Caused by: org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1]
    at org.json.JSONTokener.syntaxError(JSONTokener.java:433)
    at org.json.JSONArray.<init>(JSONArray.java:105)
    at org.json.JSONArray.<init>(JSONArray.java:144)
    at com.mashape.unirest.http.JsonNode.<init>(JsonNode.java:48)
    ... 59 more

如果我只是将所有 HTML 粘贴为字符串而不是 returnEmail()，我也会遇到同样的错误。如果我在发送前转义特殊字符和/或缩小 HTML，我也会收到相同的错误消息。

现在我假设 Unirest 是一个 http 库，它从 queryString 键和值构建一个 JSON。虽然它似乎可以与类似“HTML 版本 whatever”的 simpel html 一起使用，但它肯定不喜欢任何冗长/“正常”的 html，例如电子邮件模板。

您能否建议使用 Java API 的 html 电子邮件的任何工作示例，或者有关如何发送 html 和拥有有效 json 的任何提示？

非常感谢

最佳答案

从报错信息来看:

org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1].

我不确定 Unirest 试图做什么，但它似乎在尝试将某些内容编码为 JSON。但是 Mailgun API 不需要 JSON 编码，您可以使用良好的旧 application/x-www-form-urlencoded 编码。查看 Unirest 文档，看看您是否可以强制使用其他编码类型。

或者您可以使用 this other library (免责声明:我是开发人员)如问题评论中所述。 OP 提示 不适用于提到的复杂 html here 。我的意思是内容助手机制，您可以在其中使用链式方法调用(DSL 样式)构建 HTML 内容。如果您已经拥有 HTML，您只需将其传递给 html() 方法调用，如注释中所述。

你的代码看起来有点像这样:

// somewhere else
Configuration configuration = new Configuration()
    .domain("sub.domain.com")
    .apiKey(API_KEY)
    .from("name", "test@domain.com");

public static void sendSimpleMessage() {
    Mail.using(configuration)
        .to("myemail@gmail.com")
        .subject("Great")
        .html(returnEmail())
        .build()
        .send();
}

关于java - Mailgun Java API 发送 HTML 电子邮件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51053350/

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