PEHeader实际就是一个IMAGE_NT_HEADERS 结构。 PE header is a structure named IMAGE_NT_HEADER . Generalheaders ,例如Via,适用于整个报文。 General Headers - such as Via apply to the whole message. 为什么规则会围绕HEADERS frame的Continuation?? Why the rules around Continuation on HEADERS frames? 通过请求和响应类访问headers 和bodies. Easy access to headers and bodies through request and response classes. 位于此状态的流不能发送除了HEADERS /RST_STREAM/PRIORITY之外的帧. An endpoint MUST NOT send frames other than HEADERS or RST_STREAM.
HEAD:与GET方法类似,但是只返回headers 。 HEAD- Similar to GET method, but used to retrieve only the header information. 有几种交换类型可用:direct,topic,headers 和fanout。 There are a few exchange types available: direct, topic, headers and fanout. Entityheaders ,例如Content-Length,适用于请求的body。 Entity headers , like Content-Length which apply to the body of the request. 一个Frame包含一个command,一系列可选的headers 和一个body。 A frame consists of a command, a set of optional headers and an optional body. 反过来,这意味着许多headers 可以在不需要霍夫曼解码的情况下被解析。 This in turn means that many headers can be interpreted without being huffman decoded. IANA同时也维护着一份registryofproposednewHTTPmessageheaders 。 LANA also maintain a registry of proposed new HTTP message headers . 例如,HEADERS 和DATA帧构成了HTTP请求和响应的基础(第8.1节);. For example, HEADERS and DATA frames form the basis of HTTP requests and responses(Section 8.1); 最基本的情况是很容易的-每个HEADERS 需要识别用于那个帧的上下文。 The basic case is easy- each HEADERS frame would need to identify the context to use for that frame. 比如,HEADERS 和DATA帧构成了HTTP请求和响应的基础(Section8.1);. For example, HEADERS and DATA frames form the basis of HTTP requests and responses(Section 8.1); 如果你想为请求添加HTTP头部,只要简单地传递一个dict给headers 参数就可以了。 To add HTTP headers to a request, you can simply pass them in a dict to the headers parameter. 对应客户端提供的HTTP请求headers (也就是说名字以"HTTP_"开头的变量)。 Variables corresponding to the client-supplied HTTP request headers (i.e., variables whose names begin with"HTTP_"). 它定义了HTTP/1.1andHTTP/2的客户端和服务器所使用的标准方法,headers 和状态代码。 It defines the standard methods, headers and status codes used by HTTP/1.1 and HTTP/2 clients and servers. 它现在可以更改mod_proxy需用的请求headers ,而且它能有条件的设置回复headers 。 It can now modify request headers used by mod_proxy, and it can conditionally set response headers . Expiresheaders 告诉浏览器是否应该从服务器请求一个特定的文件或者是否应该从浏览器的缓存抓住它。 Expires Headers tell the browser whether a particular file needs to be requested from a server or from the browser's cache. 表示服务器已经收到了requestheaders ,客户端需要继续发送requestbody。 This means that the server has received the request headers , and that the client should proceed to send the request body. 为了说明这些法则,我会陆续提到很多相关的技术:HTTPheaders ,JavaScript,CSS,Apache等等。 In demonstrating this, I will cover a wide span of technologies: HTTP headers , JavaScript, CSS, Apache, and more. 遗憾的是,HTTP1.0中与缓存相关的headers 与HTTP1.1不同,因此服务器要同时支持两种版本。 Unfortunately, caching-related headers in HTTP 1.0 are different than those in HTTP 1.1, so services should support both. 相对应地,每个API的响应也都包含不同的值,例如:状态代码、body、headers 、以及完成API请求的时间。 Every API response consists of different values like status code, body, headers , and the time to complete the API request. 工具集(Utilites):快速的读取form数据,上传文件,访问cookies,headers 或者其它HTTP相关的metadata. Utilities- comfortable access to form data, file uploads, cookies, headers , and other HTTP-related metadata. 通常是类似"HTTP/1.0"或"HTTP/1.1"的东西可以被用来判断如何处理请求headers 。 Typically this will be something like"HTTP/1.0" or"HTTP/1.1" and may be used by the application to determine how to treat any HTTP request headers . 服务器已经在数据帧之间为流3交错了HEADERS 和DATA帧,以便实现流1响应多路复用!! The server has interleaved the HEADERS and DATA frames for stream 3 between the DATA frames for stream 1- response multiplexing in action! Expiresheaders 告诉浏览器是否应该从服务器请求一个特定的文件或者是否应该从浏览器的缓存抓住它。 Expires headers tell the browser whether they should request a specific file from the server or whether they should grab it from the browser's cache. Web的基本架构支持其通过URIschemes,HTTPheaders 以及内容类型等在最深的层次进行延伸。 The architecture of the Web supports extensibility at the deepest levels through URI schemes, HTTP headers , content types, and so on. IMAGE_NT_HEADERS 结构又包含了两个结构:IMAGE_FILE_HEADER文件头结构和IMAGE_OPTIONAL_HEADER可选头结构。 The IMAGE NT_ HEADERS structure consists of a signature and two additional structures, IMAGE FILE_ HEADER and IMAGE OPTIONAL HEADER. Urllib2可以接受一个Request类的实例来设置URL请求的headers ,urllib仅可以接受URL。 Urllib2 can take a Request object as an argument to add headers to the request and more, while urllib can only accept a string URL.
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