Exit Zen
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string ID 21
type: table cell
English
[link beast.ref.boost__beast__buffers_suffix `buffers_suffix`]
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string ID 119
type: paragraph
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It is possible for servers to read data from the stream and decide later that the buffered bytes should be interpreted as a WebSocket upgrade request. To address this usage, overloads of [link beast.ref.boost__beast__websocket__stream.accept `accept`] and [link beast.ref.boost__beast__websocket__stream.async_accept `async_accept`] which accept an additional buffer sequence parameter are provided.
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string ID 36
type: table cell
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`a.available_write_bytes()`
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string ID 97
type: paragraph
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Use of the flexible __Body__ concept customization point enables authors to preserve the self-contained nature of the __message__ object while allowing domain specific behaviors. Common operations for HTTP servers include sending responses which deliver file contents, and allowing for file uploads. In this example we build the [link beast.ref.boost__beast__http__basic_file_body `basic_file_body`] type which supports both reading and writing to a file on the file system. The interface is a class templated on the type of file used to access the file system, which must meet the requirements of __File__.
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string ID 16
type: variablelist cell
English
Cookies, or managing these types of HTTP headers in general, is the responsibility of higher levels. Beast just tries to get complete messages to and from the calling code. It deals in the HTTP headers just enough to process the message body and leaves the rest to callers. However, for forms and file uploads the symmetric interface of the message class allows HTTP requests to include arbitrary body types including those needed to upload a file or fill out a form.
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string ID 44
type: table cell
English
[link beast.ref.boost__beast__websocket__stream_base__timeout.idle_timeout `timeout::idle_timeout`]
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string ID 136
type: paragraph
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Since reads and writes can take place concurrently, it is possible to have two simultaneous logical operations where each operation either only reads, or only writes. The beginning of a new read or write operation will use the most recently set timeout. This will not affect operations that are already outstanding.
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string ID 147
type: paragraph
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This function can manipulate the fields common to requests and responses. If it needs to access the other fields, it can use overloads with partial specialization, or in C++17 a `constexpr` expression: ``` template<bool isRequest, class Fields, class Body> void f(message<isRequest, Fields, Body>& msg) {
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string ID 115
type: paragraph
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To use WebSockets over SSL, use an instance of the __ssl_stream__ class template as the template type for the stream. The required __io_context__ and __ssl_context__ arguments are forwarded to the wrapped stream's constructor:
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string ID 140
type: paragraph
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This example reads from a child process and sends the output back in an HTTP response. The output of the process is sent as it becomes available:
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string ID 100
type: heading
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Private Key
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string ID 81
type: paragraph
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Please visit the [@boost:/more/getting_started.html Boost documentation] for instructions on how to build and link with Boost libraries for your particular environment system.
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string ID 46
type: table cell
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[link beast.ref.boost__beast__lowest_layer_type `lowest_layer_type`]
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21
string ID 101
type: paragraph
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We demonstrate the use of these objects first by declaring a function which returns the next buffer sequence to use as a chunk body:
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string ID 25
type: table cell
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HTTP crawl (asynchronous)
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21
string ID 95
type: heading
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Writing
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21
string ID 110
type: table cell
English
This field allows the sender to indicate desired control options for the current connection. Common values include "close", "keep-alive", and "upgrade".
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string ID 224
type: paragraph
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The function [@boost:/doc/html/boost_asio/reference/bind_executor.html `net::bind_executor`] may be used when the caller wants to change the executor of a completion handler.
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string ID 80
type: table cell
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Sometimes it is necessary to first send or receive the HTTP header. For example, to read the header and take action before continuing to read the body. These functions use a __parser__ or __serializer__ to read or write the header: [link beast.ref.boost__beast__http__read_header.overload2 `read_header`], [link beast.ref.boost__beast__http__write_header.overload2 `write_header`], [link beast.ref.boost__beast__http__async_read_header `async_read_header`], and [link beast.ref.boost__beast__http__async_write_header `async_write_header`].
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string ID 66
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[link beast.ref.boost__beast__http__response_header `response_header`]
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