无法从 http 响应中找到正文数据

发布于 2024-10-17 06:17:36 字数 1580 浏览 1 评论 0原文

我正在执行名称/值对的 HTTP POST，然后尝试获取 HTTP 响应正文（并将其放入名为描述的字符串中）。

我无法找到访问响应消息正文的方法。下面是我迄今为止想到的最好的方法，但它不起作用。 “描述”变量最终变成了空。

最终目标是在服务器端编写代码来获取发布数据并返回包含有用信息的消息正文。现在我只有一个存根 html，它总是返回相同的东西（参见下面的 html）。换句话说，应用程序将向服务器发送 DTC（诊断故障代码，来自汽车），服务器将查找它并发回 HTML 正文内的描述文本。

该方法的源代码：

public String getDTCDescription (String DTC) {
    String description = "";

    String url = "http://site/test.html";
    List<NameValuePair> args = new ArrayList<NameValuePair>();

    args.add(new BasicNameValuePair("testkey","testValue")); 

    HttpResponse h;

    h = postData(url, args);

    BufferedInputStream content = null; 
    try {
        content = new BufferedInputStream(h.getEntity().getContent());
    } catch (Exception e) {
        Log.e("NetDTCInfo",e.getMessage());
    }

    if (content == null) {
        return "";
    }

    // try and loop through all the data waiting on the input stream. 
    try {
        while (content.available() > 0) {
            Log.d("NetDTCInfo","Reading a byte...");
            description = description + (char) content.read();
            Log.d("NetDTCInfo","Description is now: " + description);
        }
    } catch (IOException e) {
        Log.e("NetDTCInfo","Error while reading. " + e.getMessage());
    }


    return description;
}

文件 test.html 的源代码

<html>
        <body>
                <pre>
                        P0521|This is a description of DTC code P0521.
                </pre>
        </body>
</html>

原文

I am performing an HTTP POST of a name/value pair and then trying to obtain the HTTP response body (and place it into the String called description).

I'm unable to find a way to access the body of the response message. What I have below is the best I've come up with so far but it doesn't work. The "description" variable just ends up empty.

The end goal is to have code on the sever-side which takes the post data and returns a message body containing useful information. For now I just have a stub html in place that always returns the same thing (see html below). In other words, the app will send a DTC (Diagnostic Trouble Code, from a car) to the server and the server will look it up and send back the description text inside of the HTML body.

Source code to the method:

public String getDTCDescription (String DTC) {
    String description = "";

    String url = "http://site/test.html";
    List<NameValuePair> args = new ArrayList<NameValuePair>();

    args.add(new BasicNameValuePair("testkey","testValue")); 

    HttpResponse h;

    h = postData(url, args);

    BufferedInputStream content = null; 
    try {
        content = new BufferedInputStream(h.getEntity().getContent());
    } catch (Exception e) {
        Log.e("NetDTCInfo",e.getMessage());
    }

    if (content == null) {
        return "";
    }

    // try and loop through all the data waiting on the input stream. 
    try {
        while (content.available() > 0) {
            Log.d("NetDTCInfo","Reading a byte...");
            description = description + (char) content.read();
            Log.d("NetDTCInfo","Description is now: " + description);
        }
    } catch (IOException e) {
        Log.e("NetDTCInfo","Error while reading. " + e.getMessage());
    }


    return description;
}

Source code to the file test.html

<html>
        <body>
                <pre>
                        P0521|This is a description of DTC code P0521.
                </pre>
        </body>
</html>

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