Class MessageHeaders

java.lang.Object
org.javagi.base.ProxyInstance
org.gnome.soup.MessageHeaders
All Implemented Interfaces:
Proxy
@Generated("org.javagi.JavaGI") public class MessageHeaders extends ProxyInstance
The HTTP message headers associated with a request or response.

  • Constructor Details

    • MessageHeaders

      public MessageHeaders(MemorySegment address)
      Create a MessageHeaders proxy instance for the provided memory address.
      Parameters:
      address - the memory address of the native object

    • MessageHeaders

      public MessageHeaders(MessageHeadersType type)

      Creates a MessageHeaders.

      (Message does this automatically for its own headers. You would only need to use this method if you are manually parsing or generating message headers.)

      Parameters:
      type - the type of headers

  • Method Details

    • getType

      public static @Nullable Type getType()
      Get the GType of the MessageHeaders class.
      Returns:
      the GType

    • getMemoryLayout

      public static MemoryLayout getMemoryLayout()
      The memory layout of the native struct.
      Returns:
      the memory layout

    • append

      public void append(String name, String value)

      Appends a new header with name name and value value to hdrs.

      (If there is an existing header with name name, then this creates a second one, which is only allowed for list-valued headers; see also replace(String, String).)

      The caller is expected to make sure that name and value are syntactically correct.

      Parameters:
      name - the header name to add
      value - the new value of name

    • cleanConnectionHeaders

      public void cleanConnectionHeaders()
      Removes all the headers listed in the Connection header.

    • clear

      public void clear()
      Clears hdrs.

    • foreach

      public void foreach(@Nullable MessageHeadersForeachFunc func)

      Calls func once for each header value in hdrs.

      Beware that unlike getList(String), this processes the headers in exactly the way they were added, rather than concatenating multiple same-named headers into a single value. (This is intentional; it ensures that if you call append(String, String) multiple times with the same name, then the I/O code will output multiple copies of the header when sending the message to the remote implementation, which may be required for interoperability in some cases.)

      You may not modify the headers from func.

      Parameters:
      func - callback function to run for each header

    • freeRanges

      public void freeRanges(Range ranges)
      Frees the array of ranges returned from getRanges(long, Out).
      Parameters:
      ranges - an array of SoupRange

    • getContentDisposition

      public boolean getContentDisposition(Out<String> disposition, Out<HashTable<String,String>> params)

      Looks up the "Content-Disposition" header in hdrs, parses it, and returns its value in *disposition and *params.

      params can be null if you are only interested in the disposition-type.

      In HTTP, the most common use of this header is to set a disposition-type of "attachment", to suggest to the browser that a response should be saved to disk rather than displayed in the browser. If params contains a "filename" parameter, this is a suggestion of a filename to use. (If the parameter value in the header contains an absolute or relative path, libsoup will truncate it down to just the final path component, so you do not need to test this yourself.)

      Content-Disposition is also used in "multipart/form-data", however this is handled automatically by Multipart and the associated form methods.

      Parameters:
      disposition - return location for the disposition-type, or null
      params - return location for the Content-Disposition parameters, or null
      Returns:
      true if this MessageHeaders contains a "Content-Disposition" header, false if not (in which case *disposition and *params will be unchanged).

    • getContentLength

      public long getContentLength()

      Gets the message body length that this MessageHeaders declare.

      This will only be non-0 if getEncoding() returns Encoding.CONTENT_LENGTH.

      Returns:
      the message body length declared by hdrs.

    • getContentRange

      public boolean getContentRange(Out<Long> start, Out<Long> end, @Nullable Out<Long> totalLength)
      Parses hdrs's Content-Range header and returns it in start, end, and totalLength. If the total length field in the header was specified as "*", then totalLength will be set to -1.
      Parameters:
      start - return value for the start of the range
      end - return value for the end of the range
      totalLength - return value for the total length of the resource, or null if you don't care.
      Returns:
      true if this MessageHeaders contained a "Content-Range" header containing a byte range which could be parsed, false otherwise.

    • getContentType

      public @Nullable String getContentType(@Nullable Out<HashTable<String,String>> params)

      Looks up the "Content-Type" header in hdrs, parses it, and returns its value in *contentType and *params.

      params can be null if you are only interested in the content type itself.

      Parameters:
      params - return location for the Content-Type parameters (eg, "charset"), or null
      Returns:
      a string with the value of the "Content-Type" header or null if this MessageHeaders does not contain that header or it cannot be parsed (in which case *params will be unchanged).

    • getEncoding

      public Encoding getEncoding()

      Gets the message body encoding that this MessageHeaders declare.

      This may not always correspond to the encoding used on the wire; eg, a HEAD response may declare a Content-Length or Transfer-Encoding, but it will never actually include a body.

      Returns:
      the encoding declared by hdrs.

    • getExpectations

      public Set<Expectation> getExpectations()

      Gets the expectations declared by hdrs's "Expect" header.

      Currently this will either be Expectation.CONTINUE or Expectation.UNRECOGNIZED.

      Returns:
      the contents of hdrs's "Expect" header

    • getHeadersType

      public MessageHeadersType getHeadersType()
      Gets the type of headers.
      Returns:
      the header's type.

    • getList

      public @Nullable String getList(String name)

      Gets the value of header name in hdrs.

      Use this for headers whose values are comma-delimited lists, and which are therefore allowed to appear multiple times in the headers. For non-list-valued headers, use getOne(String).

      If name appears multiple times in hdrs, getList(String) will concatenate all of the values together, separated by commas. This is sometimes awkward to parse (eg, WWW-Authenticate, Set-Cookie), but you have to be able to deal with it anyway, because the HTTP spec explicitly states that this transformation is allowed, and so an upstream proxy could do the same thing.

      Parameters:
      name - header name
      Returns:
      the header's value or null if not found.

    • getOne

      public @Nullable String getOne(String name)

      Gets the value of header name in hdrs.

      Use this for headers whose values are not comma-delimited lists, and which therefore can only appear at most once in the headers. For list-valued headers, use getList(String).

      If this MessageHeaders does erroneously contain multiple copies of the header, it is not defined which one will be returned. (Ideally, it will return whichever one makes libsoup most compatible with other HTTP implementations.)

      Parameters:
      name - header name
      Returns:
      the header's value or null if not found.

    • getRanges

      public boolean getRanges(long totalLength, @Nullable Out<Range[]> ranges)

      Parses hdrs's Range header and returns an array of the requested byte ranges.

      The returned array must be freed with freeRanges(Range).

      If totalLength is non-0, its value will be used to adjust the returned ranges to have explicit start and end values, and the returned ranges will be sorted and non-overlapping. If totalLength is 0, then some ranges may have an end value of -1, as described under Range, and some of the ranges may be redundant.

      Beware that even if given a totalLength, this function does not check that the ranges are satisfiable.

      Server has built-in handling for range requests. If your server handler returns a Status.OK response containing the complete response body (rather than pausing the message and returning some of the response body later), and there is a Range header in the request, then libsoup will automatically convert the response to a Status.PARTIAL_CONTENT response containing only the range(s) requested by the client.

      The only time you need to process the Range header yourself is if either you need to stream the response body rather than returning it all at once, or you do not already have the complete response body available, and only want to generate the parts that were actually requested by the client.

      Parameters:
      totalLength - the total_length of the response body
      ranges - return location for an array of SoupRange
      Returns:
      true if this MessageHeaders contained a syntactically-valid "Range" header, false otherwise (in which case range and length will not be set).

    • headerContains

      public boolean headerContains(String name, String token)

      Checks whether the list-valued header name is present in hdrs, and contains a case-insensitive match for token.

      (If name is present in hdrs, then this is equivalent to calling Soup.headerContains(String, String) on its value.)

      Parameters:
      name - header name
      token - token to look for
      Returns:
      true if the header is present and contains token, false otherwise.

    • headerEquals

      public boolean headerEquals(String name, String value)
      Checks whether the header name is present in this MessageHeaders and is (case-insensitively) equal to value.
      Parameters:
      name - header name
      value - expected value
      Returns:
      true if the header is present and its value is value, false otherwise.

    • ref

      public MessageHeaders ref()
      Atomically increments the reference count of this MessageHeaders by one.
      Returns:
      the passed in SoupMessageHeaders

    • remove

      public void remove(String name)

      Removes name from hdrs.

      If there are multiple values for name, they are all removed.

      Parameters:
      name - the header name to remove

    • replace

      public void replace(String name, String value)

      Replaces the value of the header name in this MessageHeaders with value.

      See also append(String, String).

      The caller is expected to make sure that name and value are syntactically correct.

      Parameters:
      name - the header name to replace
      value - the new value of name

    • setContentDisposition

      public void setContentDisposition(String disposition, @Nullable HashTable<String,String> params)

      Sets the "Content-Disposition" header in this MessageHeaders to disposition, optionally with additional parameters specified in params.

      See getContentDisposition(Out, Out) for a discussion of how Content-Disposition is used in HTTP.

      Parameters:
      disposition - the disposition-type
      params - additional parameters

    • setContentLength

      public void setContentLength(long contentLength)

      Sets the message body length that this MessageHeaders will declare, and sets hdrs's encoding to Encoding.CONTENT_LENGTH.

      You do not normally need to call this; if this MessageHeaders is set to use Content-Length encoding, libsoup will automatically set its Content-Length header for you immediately before sending the headers. One situation in which this method is useful is when generating the response to a HEAD request; Calling setContentLength(long) allows you to put the correct content length into the response without needing to waste memory by filling in a response body which won't actually be sent.

      Parameters:
      contentLength - the message body length

    • setContentRange

      public void setContentRange(long start, long end, long totalLength)

      Sets hdrs's Content-Range header according to the given values.

      (Note that totalLength is the total length of the entire resource that this is a range of, not simply end - start + 1.)

      Server has built-in handling for range requests, and you do not normally need to call this function youself. See getRanges(long, Out) for more details.

      Parameters:
      start - the start of the range
      end - the end of the range
      totalLength - the total length of the resource, or -1 if unknown

    • setContentType

      public void setContentType(String contentType, @Nullable HashTable<String,String> params)

      Sets the "Content-Type" header in this MessageHeaders to contentType.

      Accepts additional parameters specified in params.

      Parameters:
      contentType - the MIME type
      params - additional parameters

    • setEncoding

      public void setEncoding(Encoding encoding)

      Sets the message body encoding that this MessageHeaders will declare.

      In particular, you should use this if you are going to send a request or response in chunked encoding.

      Parameters:
      encoding - a SoupEncoding

    • setExpectations

      public void setExpectations(Set<Expectation> expectations)

      Sets hdrs's "Expect" header according to expectations.

      Currently Expectation.CONTINUE is the only known expectation value. You should set this value on a request if you are sending a large message body (eg, via POST or PUT), and want to give the server a chance to reject the request after seeing just the headers (eg, because it will require authentication before allowing you to post, or because you're POSTing to a URL that doesn't exist). This saves you from having to transmit the large request body when the server is just going to ignore it anyway.

      Parameters:
      expectations - the expectations to set

    • setExpectations

      public void setExpectations(Expectation... expectations)

      Sets hdrs's "Expect" header according to expectations.

      Currently Expectation.CONTINUE is the only known expectation value. You should set this value on a request if you are sending a large message body (eg, via POST or PUT), and want to give the server a chance to reject the request after seeing just the headers (eg, because it will require authentication before allowing you to post, or because you're POSTing to a URL that doesn't exist). This saves you from having to transmit the large request body when the server is just going to ignore it anyway.

      Parameters:
      expectations - the expectations to set

    • setRange

      public void setRange(long start, long end)

      Sets hdrs's Range header to request the indicated range.

      start and end are interpreted as in a Range.

      If you need to request multiple ranges, use setRanges(Range, int).

      Parameters:
      start - the start of the range to request
      end - the end of the range to request

    • setRanges

      public void setRanges(Range ranges, int length)

      Sets hdrs's Range header to request the indicated ranges.

      If you only want to request a single range, you can use setRange(long, long).

      Parameters:
      ranges - an array of SoupRange
      length - the length of range

    • unref

      public void unref()

      Atomically decrements the reference count of this MessageHeaders by one.

      When the reference count reaches zero, the resources allocated by this MessageHeaders are freed