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<link title="Netsmtp" rel="Chapter" href="Netsmtp.html"><title>Ocamlnet 2 Reference Manual : Nethttp.Header</title>
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<center><h1>Module <a href="type_Nethttp.Header.html">Nethttp.Header</a></h1></center>
<br>
<pre><span class="keyword">module</span> Header: <code class="code">sig</code> <a href="Nethttp.Header.html">..</a> <code class="code">end</code></pre><hr width="100%">
<br>
This module is a parser/printer for the header fields used in HTTP/1.1.
 The <code class="code">get_*</code> functions generally raise <code class="code">Not_found</code> when the queried header
 is not present. If the syntax of the field is a comma-separated list of
 multiple values, the <code class="code">get_*</code> functions generally merge all headers of
 the same type. The order is preserved in this case. The list <code class="code">[]</code> means
 that the header exists, but only with empty value. For example,
<p>

 <pre><code class="code"> Accept: text/html
 Accept: text/plain
 </code></pre>
<p>

 would be returned as <code class="code">["text/html",[],[]; "text/plain", [],[]]</code>
 by <code class="code">get_accept</code>.  The header
<p>

 <pre><code class="code">Accept:</code></pre>
<p>

 would be returned as <code class="code">[]</code>.
<p>

 The <code class="code">set_*</code> functions generally produce only a single header with comma-
 separated values. Existing header are overwritten/removed.
<p>

 To remove a header, simply use the <code class="code">delete_field</code> method of <code class="code">http_header</code>.
<p>

 Error behaviour: The <code class="code">get_*</code> functions raise <code class="code">Bad_header_field</code>
 when they cannot parse a header field. The <code class="code">set_*</code> functions
 raise <code class="code">Invalid_argument</code> when an invalid value is passed to them
 (only very few functions do that).  The argument of both
 exceptions is the function name.<br>
<pre><span class="keyword">val</span> <a name="VALget_accept"></a>get_accept : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -><br>       (string * (string * string) list * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Accept</code> header as list of triples <code class="code">(media_range,
 media_range_params, accept_params)</code>.  If there are
 <code class="code">accept_params</code>, the first such parameter is always <code class="code">"q"</code>.
<p>

 All present <code class="code">Accept</code> headers are merged. The function returns
 <code class="code">[]</code> when there is at least one <code class="code">Accept</code> header, but none of
 the headers has a non-empty value. The function raises
 <code class="code">Not_found</code> if there no such headers at all (which should be
 interpreted as <code class="code"> ["*/*",[],[] ] </code>).<br>
</div>
<pre><span class="keyword">val</span> <a name="VALbest_media_type"></a>best_media_type : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list -> string * (string * string) list</code></pre><div class="info">
Returns the best media type for a header and a list of supported types.
 If any type is acceptable, "*/*" will be returned. If no type is
 acceptable, "" will be returned.
 The supported media types should be sorted such that the best type
 is mentioned first.
<p>

 Known bug: The rule that media ranges are sorted by degree of
 "specificness" is not implemented, e.g. that "text/html" is
 preferred over other "text/*" when both have the same "q" value.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_accept"></a>set_accept : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -><br>       (string * (string * string) list * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Accept</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_accept_charset"></a>get_accept_charset : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Accept-charset</code> header as list of pairs <code class="code">(charset,params)</code>.
 The only mentioned parameter in RFC 2616 is <code class="code">"q"</code>.
<p>

 All present <code class="code">Accept-charset</code> headers are merged. The function
 raises <code class="code">Not_found</code> when there is no <code class="code">Accept-charset</code> header
 (which should be interpreted as <code class="code"> ["*",[]] </code>).<br>
</div>
<pre><span class="keyword">val</span> <a name="VALbest_charset"></a>best_charset : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list -> string</code></pre><div class="info">
Returns the best charset for a header and a list of supported charsets.
 If any charset is acceptable, "*" will be returned.
 The supported charsets should be sorted such that the best charset
 is mentioned first.
<p>

 This function already implements the special handling of ISO-8859-1
 mentioned in RFC 2616.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_accept_charset"></a>set_accept_charset : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Accept-charset</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_accept_encoding"></a>get_accept_encoding : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Accept-encoding</code> header as list of pairs <code class="code">(coding,params)</code>.
 The only mentioned parameter in RFC 2616 is <code class="code">"q"</code>. The RFC describes
 compatibility problems with the "q" parameter.
<p>

 All present <code class="code">Accept-encoding</code> headers are merged. The function
 raises <code class="code">Not_found</code> when there is no <code class="code">Accept-encoding</code> header
 (which should be interpreted as <code class="code"> ["identity",[]] </code>).  The
 return value <code class="code">[]</code> must be interpreted as <code class="code"> ["identity",[]] </code>.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALbest_encoding"></a>best_encoding : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list -> string</code></pre><div class="info">
Returns the best encoding for a header and a list of supported
 encodings.  If anything else fails, "identity" will be
 returned.  The supported encodings should be sorted such that
 the best encoding is mentioned first.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_accept_encoding"></a>set_accept_encoding : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Accept-encoding</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_accept_language"></a>get_accept_language : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Accept-language</code> header as list of pairs
 <code class="code">(lang_range,params)</code>.  The only mentioned parameter in RFC
 2616 is <code class="code">"q"</code>.
<p>

 All present <code class="code">Accept-language</code> headers are merged. The function
 raises <code class="code">Not_found</code> when there is no <code class="code">Accept-language</code> header
 (which should be interpreted as <code class="code"> ["*",[]] </code>).<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_accept_language"></a>set_accept_language : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Accept-language</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_accept_ranges"></a>get_accept_ranges : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Accept-ranges</code> header as list of tokens.
<p>

 All present <code class="code">Accept-ranges</code> headers are merged. The function
 raises <code class="code">Not_found</code> when there is no <code class="code">Accept-ranges</code>
 header. The RFC leaves it open how this is to be interpreted
 in general.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_accept_ranges"></a>set_accept_ranges : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Accept-ranges</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_age"></a>get_age : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> float</code></pre><div class="info">
Returns the <code class="code">Age</code> header as number<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_age"></a>set_age : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> float -> unit</code></pre><div class="info">
Sets the <code class="code">Age</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_allow"></a>get_allow : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Allow</code> header as list of tokens.
<p>

 All present <code class="code">Allow</code> headers are merged. The function raises <code class="code">Not_found</code>
 when there is no <code class="code">Allow</code> header. The RFC leaves it open how this is
 to be interpreted in general.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_allow"></a>set_allow : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Allow</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_authorization"></a>get_authorization : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string * (string * string) list</code></pre><div class="info">
Returns the <code class="code">Authorization</code> header as pair <code class="code">(auth_scheme,auth_params)</code>,
 or raises <code class="code">Not_found</code> if not present.
<p>

 The "Basic" authentication scheme is represented specially as
 <code class="code">("basic", [ "credentials", creds ])</code> where <code class="code">creds</code> are the
 Base64-encoded credentials.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_authorization"></a>set_authorization : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string * (string * string) list -> unit</code></pre><div class="info">
Sets the <code class="code">Authorization</code> header.
 The "Basic" authentication scheme is represented as explained for
 <code class="code">get_authorization</code>.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_cache_control"></a>get_cache_control : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> <a href="Nethttp.html#TYPEcache_control_token">Nethttp.cache_control_token</a> list</code></pre><div class="info">
Returns the <code class="code">Cache-control</code> header as list of tokens.
<p>

 All present <code class="code">Cache-control</code> headers are merged. The function
 raises <code class="code">Not_found</code> when there is no <code class="code">Cache-control</code> header.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_cache_control"></a>set_cache_control : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> <a href="Nethttp.html#TYPEcache_control_token">Nethttp.cache_control_token</a> list -> unit</code></pre><div class="info">
Sets the <code class="code">Cache-control</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_connection"></a>get_connection : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Connection</code> header as list of tokens.
<p>

 All present <code class="code">Connection</code> headers are merged. The function
 raises <code class="code">Not_found</code> when there is no <code class="code">Connection</code> header.
<p>

 The Connection header must be ignored when received from a
 HTTP/1.0 client.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_connection"></a>set_connection : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Connection</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_encoding"></a>get_content_encoding : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Content-encoding</code> header as list of tokens.
<p>

 All present <code class="code">Content-encoding</code> headers are merged.
<br>
<b>Raises</b> <code>Not_found</code> when there is no <code class="code">Content-encoding</code> header.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_encoding"></a>set_content_encoding : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Content-encoding</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_language"></a>get_content_language : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Content-language</code> header as list of tokens.
<p>

 All present <code class="code">Content-language</code> headers are merged.
<br>
<b>Raises</b> <code>Not_found</code> when there is no <code class="code">Content-language</code> header.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_language"></a>set_content_language : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Content-language</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_length"></a>get_content_length : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> int64</code></pre><div class="info">
Returns the <code class="code">Content-length</code> header as number. If the number
 is too big for int64, the exception <code class="code">Bad_header_field
 "Content-length"</code> will be raised.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_length"></a>set_content_length : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> int64 -> unit</code></pre><div class="info">
Sets the <code class="code">Content-length</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_location"></a>get_content_location : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">Content-location</code> header as string.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_location"></a>set_content_location : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">Content-location</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_md5"></a>get_content_md5 : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">Content-MD5</code> header as string. The Base64 encoding
 has not been touched.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_md5"></a>set_content_md5 : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">Content-MD5</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_range"></a>get_content_range : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -><br>       [ `Bytes of (int64 * int64) option * int64 option ]</code></pre><div class="info">
Returns the <code class="code">Content-range</code> header as
 <code class="code">`Bytes(byte_range_resp_spec, instance_length)</code>.  The option value
 <code class="code">None</code> corresponds to "*" in the RFC.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_range"></a>set_content_range : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -><br>       [ `Bytes of (int64 * int64) option * int64 option ] -> unit</code></pre><div class="info">
Sets the <code class="code">Content-range</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_content_type"></a>get_content_type : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string * (string * string) list</code></pre><div class="info">
Returns the <code class="code">Content-type</code> header as pair <code class="code">(media_type, params)</code>.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_content_type"></a>set_content_type : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string * (string * string) list -> unit</code></pre><div class="info">
Sets the <code class="code">Content-type</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_date"></a>get_date : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> float</code></pre><div class="info">
Returns the <code class="code">Date</code> header as number (seconds since the Epoch).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_date"></a>set_date : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> float -> unit</code></pre><div class="info">
Sets the <code class="code">Date</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_etag"></a>get_etag : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> <a href="Nethttp.html#TYPEetag">Nethttp.etag</a></code></pre><div class="info">
Returns the <code class="code">Etag</code> header.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_etag"></a>set_etag : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> -> unit</code></pre><div class="info">
Sets the <code class="code">Etag</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_expect"></a>get_expect : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -><br>       (string * string option * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Expect</code> header as list of triples <code class="code">(token,value,params)</code>.
<p>

 All present <code class="code">Expect</code> headers are merged.
<br>
<b>Raises</b> <code>Not_found</code> when there is no <code class="code">Expect</code> header.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_expect"></a>set_expect : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -><br>       (string * string option * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Expect</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_expires"></a>get_expires : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> float</code></pre><div class="info">
Returns the <code class="code">Expires</code> header as number (seconds since the Epoch).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_expires"></a>set_expires : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> float -> unit</code></pre><div class="info">
Sets the <code class="code">Expires</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_from"></a>get_from : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">From</code> header as string.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_from"></a>set_from : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">From</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_host"></a>get_host : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string * int option</code></pre><div class="info">
Returns the <code class="code">Host</code> header as pair <code class="code">(host,port)</code>.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_host"></a>set_host : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string * int option -> unit</code></pre><div class="info">
Sets the <code class="code">Host</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_if_match"></a>get_if_match : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> list option</code></pre><div class="info">
Returns the <code class="code">If-match</code> header. The value <code class="code">None</code> means "*".
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_if_match"></a>set_if_match : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> list option -> unit</code></pre><div class="info">
Sets the <code class="code">If-match</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_if_modified_since"></a>get_if_modified_since : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> float</code></pre><div class="info">
Returns the <code class="code">If-modified-since</code> header as number (seconds
 since the Epoch).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_if_modified_since"></a>set_if_modified_since : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> float -> unit</code></pre><div class="info">
Sets the <code class="code">If-modified-since</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_if_none_match"></a>get_if_none_match : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> list option</code></pre><div class="info">
Returns the <code class="code">If-none-match</code> header. The value <code class="code">None</code> means "*".
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_if_none_match"></a>set_if_none_match : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> list option -> unit</code></pre><div class="info">
Sets the <code class="code">If-none-match</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_if_range"></a>get_if_range : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> [ `Date of float | `Etag of <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> ]</code></pre><div class="info">
Returns the <code class="code">If-range</code> header.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_if_range"></a>set_if_range : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> [ `Date of float | `Etag of <a href="Nethttp.html#TYPEetag">Nethttp.etag</a> ] -> unit</code></pre><div class="info">
Sets the <code class="code">If-range</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_if_unmodified_since"></a>get_if_unmodified_since : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> float</code></pre><div class="info">
Returns the <code class="code">If-unmodified-since</code> header as number (seconds
 since the Epoch).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_if_unmodified_since"></a>set_if_unmodified_since : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> float -> unit</code></pre><div class="info">
Sets the <code class="code">If-unmodified-since</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_last_modified"></a>get_last_modified : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> float</code></pre><div class="info">
Returns the <code class="code">Last-modified</code> header as number (seconds since the Epoch).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_last_modified"></a>set_last_modified : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> float -> unit</code></pre><div class="info">
Sets the <code class="code">Last-modified</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_location"></a>get_location : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">Location</code> header as string.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_location"></a>set_location : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">Location</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_max_forwards"></a>get_max_forwards : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> int</code></pre><div class="info">
Returns the <code class="code">Max-forwards</code> header as number.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_max_forwards"></a>set_max_forwards : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> int -> unit</code></pre><div class="info">
Sets the <code class="code">Max-forwards</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_pragma"></a>get_pragma : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * string option) list</code></pre><div class="info">
Returns the <code class="code">Pragma</code> header as list of pairs <code class="code">(token,value)</code>.
<p>

 All present <code class="code">Pragma</code> headers are merged.
<br>
<b>Raises</b> <code>Not_found</code> when there is no <code class="code">Pragma</code> header.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_pragma"></a>set_pragma : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * string option) list -> unit</code></pre><div class="info">
Sets the <code class="code">Pragma</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_proxy_authenticate"></a>get_proxy_authenticate : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Proxy-authenticate</code> header as list of challenges
 <code class="code">(auth_scheme,auth_params)</code>.
<p>

 All present <code class="code">Proxy-authenticate</code> headers are merged.
<br>
<b>Raises</b> <code>Not_found</code> when there is no <code class="code">Proxy-authenticate</code> header.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_proxy_authenticate"></a>set_proxy_authenticate : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Proxy-authenticate</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_proxy_authorization"></a>get_proxy_authorization : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string * (string * string) list</code></pre><div class="info">
Returns the <code class="code">Proxy-authorization</code> header as pair
 <code class="code">(auth_scheme,auth_params)</code>.<br>
<b>Raises</b> <code>Not_found</code> when the header is
 missing.
<p>

 The "Basic" authentication scheme is represented specially as
 <code class="code">("basic", [ "credentials", creds ])</code> where <code class="code">creds</code> are the
 Base64-encoded credentials.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_proxy_authorization"></a>set_proxy_authorization : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string * (string * string) list -> unit</code></pre><div class="info">
Sets the <code class="code">Proxy-authorization</code> header
 The "Basic" authentication scheme is represented as explained for
 <code class="code">get_proxy_authorization</code>.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_range"></a>get_range : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> [ `Bytes of (int64 option * int64 option) list ]</code></pre><div class="info">
Returns the <code class="code">Range</code> header as <code class="code">`Bytes ranges</code>, where the list <code class="code">ranges</code>
 has elements of the form <code class="code">(Some first_pos, Some last_pos)</code>,
 <code class="code">(Some first_pos, None)</code> (prefix range), or <code class="code">(None, Some
 last_pos)</code> (suffix range).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_range"></a>set_range : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -><br>       [ `Bytes of (int64 option * int64 option) list ] -> unit</code></pre><div class="info">
Sets the <code class="code">Range</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_referer"></a>get_referer : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">Referer</code> header as string.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_referrer"></a>get_referrer : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Same, for addicts of correct orthography<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_referer"></a>set_referer : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">Referer</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_referrer"></a>set_referrer : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Same, for addicts of correct orthography<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_retry_after"></a>get_retry_after : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> [ `Date of float | `Seconds of int ]</code></pre><div class="info">
Returns the <code class="code">Retry-after</code> header.
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_retry_after"></a>set_retry_after : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> [ `Date of float | `Seconds of int ] -> unit</code></pre><div class="info">
Sets the <code class="code">Retry-after</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_server"></a>get_server : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">Server</code> header as uninterpreted string (including
 comments).
<br>
<b>Raises</b> <code>Not_found</code> when the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_server"></a>set_server : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">Server</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_te"></a>get_te : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -><br>       (string * (string * string) list * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">TE</code> header as list of triples
 <code class="code">(te_token, te_params, accept_params)</code>.
 If there are <code class="code">accept_params</code>, the first such parameter is always <code class="code">"q"</code>.
<p>

 All present <code class="code">TE</code> headers are merged. The function returns <code class="code">[]</code> when
 there is at least one <code class="code">TE</code> header, but none of the headers has a
 non-empty value.
<br>
<b>Raises</b> <code>Not_found</code> if there no such headers at all.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_te"></a>set_te : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -><br>       (string * (string * string) list * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">TE</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_trailer"></a>get_trailer : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Trailer</code> header as list of field names.
<p>

 All present <code class="code">Trailer</code> headers are merged. The function returns
 <code class="code">[]</code> when there is at least one <code class="code">Trailer</code> header, but none of
 the headers has a non-empty value.
<br>
<b>Raises</b> <code>Not_found</code> if there no such headers at all.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_trailer"></a>set_trailer : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Trailer</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_transfer_encoding"></a>get_transfer_encoding : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">Transfer-encoding</code> header as list of pairs
 <code class="code">(token, params)</code>.
<p>

 All present <code class="code">Transfer-encoding</code> headers are merged. The
 function returns <code class="code">[]</code> when there is at least one
 <code class="code">Transfer-encoding</code> header, but none of the headers has a
 non-empty value.
<br>
<b>Raises</b> <code>Not_found</code> if there no such headers at all.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_transfer_encoding"></a>set_transfer_encoding : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">Transfer-encoding</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_upgrade"></a>get_upgrade : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string list</code></pre><div class="info">
Returns the <code class="code">Upgrade</code> header as list of products.
<p>

 All present <code class="code">Upgrade</code> headers are merged. The function returns
 <code class="code">[]</code> when there is at least one <code class="code">Upgrade</code> header, but none of
 the headers has a non-empty value.
<br>
<b>Raises</b> <code>Not_found</code> if there no such headers at all.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_upgrade"></a>set_upgrade : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string list -> unit</code></pre><div class="info">
Sets the <code class="code">Upgrade</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_user_agent"></a>get_user_agent : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> string</code></pre><div class="info">
Returns the <code class="code">User-agent</code> header as uninterpreted string
 (including comments).
<br>
<b>Raises</b> <code>Not_found</code> if the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_user_agent"></a>set_user_agent : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> string -> unit</code></pre><div class="info">
Sets the <code class="code">User-agent</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_vary"></a>get_vary : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> [ `Fields of string list | `Star ]</code></pre><div class="info">
Returns the <code class="code">Vary</code> header.
<br>
<b>Raises</b> <code>Not_found</code> if the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_vary"></a>set_vary : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> [ `Fields of string list | `Star ] -> unit</code></pre><div class="info">
Sets the <code class="code">Vary</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_www_authenticate"></a>get_www_authenticate : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * (string * string) list) list</code></pre><div class="info">
Returns the <code class="code">WWW-Authenticate</code> header as list of challenges
 <code class="code">(auth_scheme,auth_params)</code>.
<p>

 All present <code class="code">WWW-Authenticate</code> headers are merged.
<br>
<b>Raises</b> <code>Not_found</code> if the header is missing.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_www_authenticate"></a>set_www_authenticate : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * (string * string) list) list -> unit</code></pre><div class="info">
Sets the <code class="code">WWW-Authenticate</code> header<br>
</div>
<pre><span class="keyword">val</span> <a name="VALget_cookie"></a>get_cookie : <code class="type">#<a href="Nethttp.http_header_ro.html">Nethttp.http_header_ro</a> -> (string * string) list</code></pre><div class="info">
Get the cookies as (name,value) pairs (or Not_found)<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_cookie"></a>set_cookie : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> (string * string) list -> unit</code></pre><div class="info">
Set the <code class="code">Cookie</code> header. Note: This does not set cookies in the client,
 use <code class="code">set_set_cookie</code> instead!<br>
</div>
<pre><span class="keyword">val</span> <a name="VALset_set_cookie"></a>set_set_cookie : <code class="type">#<a href="Nethttp.http_header.html">Nethttp.http_header</a> -> <a href="Nethttp.html#TYPEcookie">Nethttp.cookie</a> list -> unit</code></pre><div class="info">
Set the <code class="code">Set-Cookie</code> header<br>
</div>
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