45 lines
1.3 KiB
Hare
45 lines
1.3 KiB
Hare
use fmt;
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use io;
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use strings;
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// List of HTTP headers.
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export type header = [](str, str);
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// Adds a given HTTP header, which may be added more than once. The value is
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// duplicated, but the name is borrowed from the caller. The name should be
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// canonicalized by the caller.
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export fn add_header(head: *header, name: str, val: str) void = {
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append(head, (name, strings::dup(val)));
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};
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// Sets the value of a given HTTP header, removing any previous values. The
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// value is duplicated, but the name is borrowed from the caller. The name
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// should be canonicalized by the caller.
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export fn set_header(head: *header, name: str, val: str) void = {
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del_header(head, name);
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add_header(head, name, val);
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};
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// Removes an HTTP header from a list of [[header]]. If multiple headers match
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// the given name, all matching headers are removed.
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export fn del_header(head: *header, name: str) void = {
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for (let i = 0z; i < len(head); i += 1) {
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if (head[i].0 == name) {
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free(head[i].1);
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delete(head[i]);
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i -= 1;
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};
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};
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};
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// Writes a list of HTTP headers to the provided I/O handle in the HTTP wire
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// format.
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export fn write_header(sink: io::handle, head: *header) (size | io::error) = {
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let z = 0z;
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for (let i = 0z; i < len(head); i += 1) {
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const (name, val) = head[i];
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z += fmt::fprintf(sink, "{}: {}\r\n", name, val)?;
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};
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return z;
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};
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