java中的setRequestProperty
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setRequestProperty in java
提问by John
The documentation heresays that setRequestPropertysets the general request property.
这里的文档说setRequestProperty设置一般请求属性。
So suppose I have the following code snippet showing the usage of setRequestPropertyas follows:
所以假设我有以下代码片段显示setRequestProperty如下用法：
URL url = new URL(requestUrl);
URLConnection urlConn = url.openConnection();
urlConn.setRequestProperty("accept", "application/json");
urlConn.setRequestProperty("datetime", dateTimeString);
urlConn.setRequestProperty("authorization", authorization);
urlConn.setUseCaches(false);
urlConn.setDoInput(true); // Triggers POST
Q1: Does acceptneed to have an uppercase Ahere? Similarly, for authorization, does it need to have an uppercase Aas well? The reason I am asking this is because I have seen many post where people have been using authorizationas say for example conn.setRequestProperty ("Authorization", "Basic " + encodedString);. This is shown here.
Q1：这里accept需要大写A吗？同样，对于authorization，它是否也需要大写A？我问这个的原因是因为我看过很多帖子，人们一直在使用authorizationas say conn.setRequestProperty ("Authorization", "Basic " + encodedString);。这在此处显示。
Q2. Since I have lot of setRequestPropertyproperty defined above, does this means that, a URL contains all of these properties? Are there any other properties that exists besides the one I have used above?
Q2。由于我在setRequestProperty上面定义了很多属性，这是否意味着 URL 包含所有这些属性？除了我上面使用的属性之外，还有其他属性吗？
采纳答案by sendon1982
A1: HTTP header fields, which include general-header (section 4.5), request-header (section 5.3), response-header (section 6.2), and entity-header (section 7.1) fields, follow the same generic format as that given in Section 3.1 of RFC 822 [9]. Each header field consists of a name followed by a colon (":") and the field value. Field names are case-insensitive.
A1：HTTP 头字段，包括通用头（4.5 节）、请求头（5.3 节）、响应头（6.2 节）和实体头（7.1 节）字段，遵循与给定相同的通用格式在 RFC 822 [9] 的第 3.1 节中。每个头字段由一个名称后跟一个冒号（“:”）和字段值组成。字段名称不区分大小写。
A2: These variables will be in the HTTP request header. If you want URL contains these parameters, you need to append them on the URL:
A2：这些变量将在 HTTP 请求标头中。如果您希望 URL 包含这些参数，则需要将它们附加到 URL 上：
http://www.google.com?bar=far&boo=foo
