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Query Info Flags

The following lists contain the attributes and modifiers used by HttpQueryInfo and QueryInfo.

The attribute flags are used by HttpQueryInfo (or QueryInfo) to indicate what data to retrieve. Most of the attribute flags map directly to a specific HTTP header. There are also some special flags, such as HTTP_QUERY_RAW_HEADERS, that are not related to a specific header.

HTTP_QUERY_ACCEPT
24

Retrieves the acceptable media types for the response.

HTTP_QUERY_ACCEPT_CHARSET
25

Retrieves the acceptable character sets for the response.

HTTP_QUERY_ACCEPT_ENCODING
26

Retrieves the acceptable content-coding values for the response.

HTTP_QUERY_ACCEPT_LANGUAGE
27

Retrieves the acceptable natural languages for the response.

HTTP_QUERY_ACCEPT_RANGES
42

Retrieves the types of range requests that are accepted for a resource.

HTTP_QUERY_AGE
48

Retrieves the Age response-header field, which contains the sender's estimate of the amount of time since the response was generated at the origin server.

HTTP_QUERY_ALLOW
7

Receives the HTTP verbs supported by the server.

HTTP_QUERY_AUTHORIZATION
28

Retrieves the authorization credentials used for a request.

HTTP_QUERY_CACHE_CONTROL
49

Retrieves the cache control directives.

HTTP_QUERY_CONNECTION
23

Retrieves any options that are specified for a particular connection and must not be communicated by proxies over further connections.

HTTP_QUERY_CONTENT_BASE
50

Retrieves the base URI (Uniform Resource Identifier) for resolving relative URLs within the entity.

HTTP_QUERY_CONTENT_DESCRIPTION
4

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_CONTENT_DISPOSITION
47

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_CONTENT_ENCODING
29

Retrieves any additional content codings that have been applied to the entire resource.

HTTP_QUERY_CONTENT_ID
3

Retrieves the content identification.

HTTP_QUERY_CONTENT_LANGUAGE
6

Retrieves the language that the content is in.

HTTP_QUERY_CONTENT_LENGTH
5

Retrieves the size of the resource, in bytes.

HTTP_QUERY_CONTENT_LOCATION
51

Retrieves the resource location for the entity enclosed in the message.

HTTP_QUERY_CONTENT_MD5
52

Retrieves an MD5 digest of the entity-body for the purpose of providing an end-to-end message integrity check (MIC) for the entity-body. For more information, see RFC1864, The Content-MD5 Header Field, at http://ftp.isi.edu/in-notes/rfc1864.txt.

HTTP_QUERY_CONTENT_RANGE
53

Retrieves the location in the full entity-body where the partial entity-body should be inserted and the total size of the full entity-body.

HTTP_QUERY_CONTENT_TRANSFER_ENCODING
2

Receives the additional content coding that has been applied to the resource.

HTTP_QUERY_CONTENT_TYPE
1

Receives the content type of the resource (such as text/html).

HTTP_QUERY_COOKIE
44

Retrieves any cookies associated with the request.

HTTP_QUERY_COST
15

No longer supported.

HTTP_QUERY_CUSTOM
65535

Causes HttpQueryInfo to search for the header name specified in lpvBuffer and store the header data in lpvBuffer.

HTTP_QUERY_DATE
9

Receives the date and time at which the message was originated.

HTTP_QUERY_DERIVED_FROM
14

No longer supported.

HTTP_QUERY_ECHO_HEADERS
73

Not currently implemented.

HTTP_QUERY_ECHO_HEADERS_CRLF
74

Not currently implemented.

HTTP_QUERY_ECHO_REPLY
72

Not currently implemented.

HTTP_QUERY_ECHO_REQUEST
71

Not currently implemented.

HTTP_QUERY_ETAG
54

Retrieves the entity tag for the associated entity.

HTTP_QUERY_EXPECT
68

Retrieves the Expect header, which indicates whether the client application should expect 100 series responses.

HTTP_QUERY_EXPIRES
10

Receives the date and time after which the resource should be considered outdated.

HTTP_QUERY_FORWARDED
30

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_FROM
31

Retrieves the email address for the human user who controls the requesting user agent if the From header is given.

HTTP_QUERY_HOST
55

Retrieves the Internet host and port number of the resource being requested.

HTTP_QUERY_IF_MATCH
56

Retrieves the contents of the If-Match request-header field.

HTTP_QUERY_IF_MODIFIED_SINCE
32

Retrieves the contents of the If-Modified-Since header.

HTTP_QUERY_IF_NONE_MATCH
57

Retrieves the contents of the If-None-Match request-header field.

HTTP_QUERY_IF_RANGE
58

Retrieves the contents of the If-Range request-header field. This header enables the client application to verify that the entity related to a partial copy of the entity in the client application cache has not been updated. If the entity has not been updated, send the parts that the client application is missing. If the entity has been updated, send the entire updated entity.

HTTP_QUERY_IF_UNMODIFIED_SINCE
59

Retrieves the contents of the If-Unmodified-Since request-header field.

HTTP_QUERY_LAST_MODIFIED
11

Receives the date and time at which the server believes the resource was last modified.

HTTP_QUERY_LINK
16

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_LOCATION
33

Retrieves the absolute Uniform Resource Identifier (URI) used in a Location response-header.

HTTP_QUERY_MAX
78

Not a query flag. Indicates the maximum value of an HTTP_QUERY_* value.

HTTP_QUERY_MAX_FORWARDS
60

Retrieves the number of proxies or gateways that can forward the request to the next inbound server.

HTTP_QUERY_MESSAGE_ID
12

No longer supported.

HTTP_QUERY_MIME_VERSION
0

Receives the version of the MIME protocol that was used to construct the message.

HTTP_QUERY_ORIG_URI
34

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_PRAGMA
17

Receives the implementation-specific directives that might apply to any recipient along the request/response chain.

HTTP_QUERY_PROXY_AUTHENTICATE
41

Retrieves the authentication scheme and realm returned by the proxy.

HTTP_QUERY_PROXY_AUTHORIZATION
61

Retrieves the header that is used to identify the user to a proxy that requires authentication. This header can only be retrieved before the request is sent to the server.

HTTP_QUERY_PROXY_CONNECTION
69

Retrieves the Proxy-Connection header.

HTTP_QUERY_PUBLIC
8

Receives methods available at this server.

HTTP_QUERY_RANGE
62

Retrieves the byte range of an entity.

HTTP_QUERY_RAW_HEADERS
21

Receives all the headers returned by the server. Each header is terminated by "\0". An additional "\0" terminates the list of headers.

HTTP_QUERY_RAW_HEADERS_CRLF
22

Receives all the headers returned by the server. Each header is separated by a carriage return/line feed (CR/LF) sequence.

HTTP_QUERY_REFERER
35

Receives the Uniform Resource Identifier (URI) of the resource where the requested URI was obtained.

HTTP_QUERY_REFRESH
46

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_REQUEST_METHOD
45

Receives the HTTP verb that is being used in the request, typically GET or POST.

HTTP_QUERY_RETRY_AFTER
36

Retrieves the amount of time the service is expected to be unavailable.

HTTP_QUERY_SERVER
37

Retrieves data about the software used by the origin server to handle the request.

HTTP_QUERY_SET_COOKIE
43

Receives the value of the cookie set for the request.

HTTP_QUERY_STATUS_CODE
19

Receives the status code returned by the server. For more information and a list of possible values, see HTTP Status Codes.

HTTP_QUERY_STATUS_TEXT
20

Receives any additional text returned by the server on the response line.

HTTP_QUERY_TITLE
38

Obsolete. Maintained for legacy application compatibility only.

HTTP_QUERY_TRANSFER_ENCODING
63

Retrieves the type of transformation that has been applied to the message body so it can be safely transferred between the sender and recipient.

HTTP_QUERY_UNLESS_MODIFIED_SINCE
70

Retrieves the Unless-Modified-Since header.

HTTP_QUERY_UPGRADE
64

Retrieves the additional communication protocols that are supported by the server.

HTTP_QUERY_URI
13

Receives some or all of the Uniform Resource Identifiers (URIs) by which the Request-URI resource can be identified.

HTTP_QUERY_USER_AGENT
39

Retrieves data about the user agent that made the request.

HTTP_QUERY_VARY
65

Retrieves the header that indicates that the entity was selected from a number of available representations of the response using server-driven negotiation.

HTTP_QUERY_VERSION
18

Receives the last response code returned by the server.

HTTP_QUERY_VIA
66

Retrieves the intermediate protocols and recipients between the user agent and the server on requests, and between the origin server and the client on responses.

HTTP_QUERY_WARNING
67

Retrieves additional data about the status of a response that might not be reflected by the response status code.

HTTP_QUERY_WWW_AUTHENTICATE
40

Retrieves the authentication scheme and realm returned by the server.

HTTP_QUERY_X_CONTENT_TYPE_OPTIONS
79

Retrieves the X-Content-Type-Options header value.

HTTP_QUERY_P3P
80

Retrieves the P3P header value.

HTTP_QUERY_X_P2P_PEERDIST
81

Retrieves the X-P2P-PeerDist header value.

HTTP_QUERY_TRANSLATE
82

Retrieves the translate header value.

HTTP_QUERY_X_UA_COMPATIBLE
83

Retrieves the X-UA-Compatible header value.

HTTP_QUERY_DEFAULT_STYLE
84

Retrieves the Default-Style header value.

HTTP_QUERY_X_FRAME_OPTIONS
85

Retrieves the X-Frame-Options header value.

HTTP_QUERY_X_XSS_PROTECTION
86

Retrieves the X-XSS-Protection header value.

The modifier flags are used in conjunction with an attribute flag to modify the request. Modifier flags either modify the format of the data returned or indicate where HttpQueryInfo (or QueryInfo) should search for the data.

HTTP_QUERY_FLAG_COALESCE
0x10000000

Not implemented.

HTTP_QUERY_FLAG_NUMBER
0x20000000

Returns the data as a 32-bit number for headers whose value is a number, such as the status code.

HTTP_QUERY_FLAG_REQUEST_HEADERS
0x80000000

Queries request headers only.

HTTP_QUERY_FLAG_SYSTEMTIME
0x40000000

Returns the header value as a SYSTEMTIME structure, which does not require the application to parse the data. Use for headers whose value is a date/time string, such as "Last-Modified-Time".

Remarks

Note  WinINet does not support server implementations. In addition, it should not be used from a service. For server implementations or services use Microsoft Windows HTTP Services (WinHTTP).

Requirements

Minimum supported client

Windows 2000 Professional

Minimum supported server

Windows 2000 Server

Header

Wininet.h

 

 

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