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MINOR: hpack: provide a function to encode an HTTP method

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The new function hpack_encode_method() supports encoding a method.
It knows about GET and POST which use a single byte, and falls back
to literal encoding for other ones.
This commit is contained in:
Willy Tarreau 2018-12-10 18:24:19 +01:00
parent aafdf58333
commit 39c80ebff0
1 changed files with 21 additions and 0 deletions
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21
include/common/hpack-enc.h
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@ -32,6 +32,7 @@
#include <string.h> #include <string.h>
#include <common/buf.h> #include <common/buf.h>
#include <common/config.h> #include <common/config.h>
#include <common/http.h>
#include <common/ist.h> #include <common/ist.h>
int hpack_encode_header(struct buffer *out, const struct ist n, int hpack_encode_header(struct buffer *out, const struct ist n,
@ -199,4 +200,24 @@ static inline int hpack_encode_str_status(struct buffer *out, unsigned int statu
return hpack_encode_short_idx(out, 8, str); // name=":status" (idx 8) return hpack_encode_short_idx(out, 8, str); // name=":status" (idx 8)
} }
/* Tries to encode a :method pseudo-header with the method in <meth>, which
* also exists as a string in <str>, into the aligned buffer <out>. Returns
* non-zero on success or 0 on failure (buffer full). The caller is responsible
* for ensuring that the string matches <meth>, that it's smaller than 127
* bytes, and that the buffer is aligned. If <meth> is unknown then using
* HTTP_METH_OTHER will lead to the string being encoded as a literal. It's
* inlined because it's easily optimizable.
*/
static inline int hpack_encode_method(struct buffer *out, enum http_meth_t meth, struct ist str)
{
if (out->data < out->size && meth == HTTP_METH_GET)
out->area[out->data++] = 0x82; // indexed field : idx[02]=(":method", "GET")
else if (out->data < out->size && meth == HTTP_METH_POST)
out->area[out->data++] = 0x83; // indexed field : idx[03]=(":method", "POST")
else
return hpack_encode_short_idx(out, 2, str); // name=":method" (idx 2)
return 1;
}
#endif /* _COMMON_HPACK_ENC_H */ #endif /* _COMMON_HPACK_ENC_H */