how to create barcodes in excel free Code in Software

Encoder Code 39 in Software Code

100 101

The initial part of the request has been received, and the client may continue with its request The server is complying with a client request to switch protocols defined in the upgrade header

200 201 202 204

The request is successful A new URL is created The request is accepted, but it is not immediately acted upon There is no content in the body

Table 272 Status codes (continued)

301 302 304 400 401 403 404 405 406 500 501 503

The requested URL is no longer used by the server The requested URL has moved temporarily The document has not been modified

Bad request Unauthorized Forbidden Not found Method not allowed Not acceptable There is a syntax error in the request The request lacks proper authorization Service is denied The document is not found The method is not supported in this URL The format requested is not acceptable

Internal server error Not implemented Service unavailable There is an error, such as a crash, at the server site The action requested cannot be performed The service is temporarily unavailable, but may be requested in the future

Header The header exchanges additional information between the client and the server For example, the client can request that the document be sent in a special format, or the server can send extra information about the document The header can consist of one or more header lines Each header line has a header name, a colon, a space, and a header value (see Figure 2715) We will show some header lines in the examples at the end of this chapter A header line belongs to one of four categories: general header, request header, response header, and entity header A request message can contain only general, request, and entity headers A response message, on the other hand, can contain only general, response, and entity headers

General header The general header gives general information about the message and can be present in both a request and a response Table 273 lists some general headers with their descriptions

Specifies infonnation about caching Shows whether the connection should be closed or not Shows the current date Shows the MIME version used Specifies the preferred communication protocol

Request header The request header can be present only in a request message It specifies the client's configuration and the client's preferred document format See Table 274 for a list of some request headers and their descriptions Table 274 Request headers

Accept Accept-charset Accept-encoding Accept-language Authorization From Host If-modified-since If-match If-non-match

Shows the medium fonnat the client can accept Shows the character set the client can handle Shows the encoding scheme the client can handle Shows the language the client can accept Shows what pennissions the client has Shows the e-mail address of the user Shows the host and port number of the server Sends the document if newer than specified date Sends the document only if it matches given tag

'-__--

__---

Sends only the portion of the document that is missing Sends the document if not changed since specified date Specifies the URL of the linked document Identifies the client program

Response header The response header can be present only in a response message It specifies the server's configuration and special information about the request See Table 275 for a list of some response headers with their descriptions Table 275 Response headers

Shows if server accepts the range requested by client Shows the age of the document Shows the supported list of methods Specifies the date after which the server is available Shows the server name and version number