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Search static header table linearly

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This commit is contained in:
Tatsuhiro Tsujikawa 2014-07-20 19:13:56 +09:00
parent db3b07735b
commit d99e1135c8
3 changed files with 81 additions and 126 deletions
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167
lib/nghttp2_hd.c
View File

@ -32,81 +32,72 @@
#include "nghttp2_int.h" #include "nghttp2_int.h"
/* Make scalar initialization form of nghttp2_nv */ /* Make scalar initialization form of nghttp2_nv */
#define MAKE_STATIC_ENT(I, N, V, NH, VH) \ #define MAKE_ENT(N, V, NH, VH) \
{ { { (uint8_t*)N, (uint8_t*)V, sizeof(N) - 1, sizeof(V) - 1, 0 }, \ { { (uint8_t*)N, (uint8_t*)V, sizeof(N) - 1, sizeof(V) - 1, 0}, \
NH, VH, 1, NGHTTP2_HD_FLAG_NONE }, I } NH, VH, 1, NGHTTP2_HD_FLAG_NONE }
/* Sorted by hash(name) and its table index */ static nghttp2_hd_entry static_table[] = {
static nghttp2_hd_static_entry static_table[] = { MAKE_ENT(":authority", "", 2962729033u, 0u),
MAKE_STATIC_ENT(20, "age", "", 96511u, 0u), MAKE_ENT(":method", "GET", 3153018267u, 70454u),
MAKE_STATIC_ENT(59, "via", "", 116750u, 0u), MAKE_ENT(":method", "POST", 3153018267u, 2461856u),
MAKE_STATIC_ENT(32, "date", "", 3076014u, 0u), MAKE_ENT(":path", "/", 56997727u, 47u),
MAKE_STATIC_ENT(33, "etag", "", 3123477u, 0u), MAKE_ENT(":path", "/index.html", 56997727u, 2144181430u),
MAKE_STATIC_ENT(36, "from", "", 3151786u, 0u), MAKE_ENT(":scheme", "http", 3322585695u, 3213448u),
MAKE_STATIC_ENT(37, "host", "", 3208616u, 0u), MAKE_ENT(":scheme", "https", 3322585695u, 99617003u),
MAKE_STATIC_ENT(44, "link", "", 3321850u, 0u), MAKE_ENT(":status", "200", 3338091692u, 49586u),
MAKE_STATIC_ENT(58, "vary", "", 3612210u, 0u), MAKE_ENT(":status", "204", 3338091692u, 49590u),
MAKE_STATIC_ENT(38, "if-match", "", 34533653u, 0u), MAKE_ENT(":status", "206", 3338091692u, 49592u),
MAKE_STATIC_ENT(41, "if-range", "", 39145613u, 0u), MAKE_ENT(":status", "304", 3338091692u, 50551u),
MAKE_STATIC_ENT(3, ":path", "/", 56997727u, 47u), MAKE_ENT(":status", "400", 3338091692u, 51508u),
MAKE_STATIC_ENT(4, ":path", "/index.html", 56997727u, 2144181430u), MAKE_ENT(":status", "404", 3338091692u, 51512u),
MAKE_STATIC_ENT(21, "allow", "", 92906313u, 0u), MAKE_ENT(":status", "500", 3338091692u, 52469u),
MAKE_STATIC_ENT(49, "range", "", 108280125u, 0u), MAKE_ENT("accept-charset", "", 124285319u, 0u),
MAKE_STATIC_ENT(14, "accept-charset", "", 124285319u, 0u), MAKE_ENT("accept-encoding", "gzip, deflate", 4127597688u, 1733326877u),
MAKE_STATIC_ENT(43, "last-modified", "", 150043680u, 0u), MAKE_ENT("accept-language", "", 802785917u, 0u),
MAKE_STATIC_ENT(48, "proxy-authorization", "", 329532250u, 0u), MAKE_ENT("accept-ranges", "", 1397189435u, 0u),
MAKE_STATIC_ENT(57, "user-agent", "", 486342275u, 0u), MAKE_ENT("accept", "", 2871506184u, 0u),
MAKE_STATIC_ENT(40, "if-none-match", "", 646073760u, 0u), MAKE_ENT("access-control-allow-origin", "", 3297999203u, 0u),
MAKE_STATIC_ENT(30, "content-type", "", 785670158u, 0u), MAKE_ENT("age", "", 96511u, 0u),
MAKE_STATIC_ENT(16, "accept-language", "", 802785917u, 0u), MAKE_ENT("allow", "", 92906313u, 0u),
MAKE_STATIC_ENT(50, "referer", "", 1085069613u, 0u), MAKE_ENT("authorization", "", 2909397113u, 0u),
MAKE_STATIC_ENT(51, "refresh", "", 1085444827u, 0u), MAKE_ENT("cache-control", "", 4086191634u, 0u),
MAKE_STATIC_ENT(55, "strict-transport-security", "", 1153852136u, 0u), MAKE_ENT("content-disposition", "", 3027699811u, 0u),
MAKE_STATIC_ENT(54, "set-cookie", "", 1237214767u, 0u), MAKE_ENT("content-encoding", "", 2095084583u, 0u),
MAKE_STATIC_ENT(56, "transfer-encoding", "", 1274458357u, 0u), MAKE_ENT("content-language", "", 3065240108u, 0u),
MAKE_STATIC_ENT(17, "accept-ranges", "", 1397189435u, 0u), MAKE_ENT("content-length", "", 3162187450u, 0u),
MAKE_STATIC_ENT(42, "if-unmodified-since", "", 1454068927u, 0u), MAKE_ENT("content-location", "", 2284906121u, 0u),
MAKE_STATIC_ENT(46, "max-forwards", "", 1619948695u, 0u), MAKE_ENT("content-range", "", 2878374633u, 0u),
MAKE_STATIC_ENT(45, "location", "", 1901043637u, 0u), MAKE_ENT("content-type", "", 785670158u, 0u),
MAKE_STATIC_ENT(52, "retry-after", "", 1933352567u, 0u), MAKE_ENT("cookie", "", 2940209764u, 0u),
MAKE_STATIC_ENT(25, "content-encoding", "", 2095084583u, 0u), MAKE_ENT("date", "", 3076014u, 0u),
MAKE_STATIC_ENT(28, "content-location", "", 2284906121u, 0u), MAKE_ENT("etag", "", 3123477u, 0u),
MAKE_STATIC_ENT(39, "if-modified-since", "", 2302095846u, 0u), MAKE_ENT("expect", "", 3005803609u, 0u),
MAKE_STATIC_ENT(18, "accept", "", 2871506184u, 0u), MAKE_ENT("expires", "", 2985731892u, 0u),
MAKE_STATIC_ENT(29, "content-range", "", 2878374633u, 0u), MAKE_ENT("from", "", 3151786u, 0u),
MAKE_STATIC_ENT(22, "authorization", "", 2909397113u, 0u), MAKE_ENT("host", "", 3208616u, 0u),
MAKE_STATIC_ENT(31, "cookie", "", 2940209764u, 0u), MAKE_ENT("if-match", "", 34533653u, 0u),
MAKE_STATIC_ENT(0, ":authority", "", 2962729033u, 0u), MAKE_ENT("if-modified-since", "", 2302095846u, 0u),
MAKE_STATIC_ENT(35, "expires", "", 2985731892u, 0u), MAKE_ENT("if-none-match", "", 646073760u, 0u),
MAKE_STATIC_ENT(34, "expect", "", 3005803609u, 0u), MAKE_ENT("if-range", "", 39145613u, 0u),
MAKE_STATIC_ENT(24, "content-disposition", "", 3027699811u, 0u), MAKE_ENT("if-unmodified-since", "", 1454068927u, 0u),
MAKE_STATIC_ENT(26, "content-language", "", 3065240108u, 0u), MAKE_ENT("last-modified", "", 150043680u, 0u),
MAKE_STATIC_ENT(1, ":method", "GET", 3153018267u, 70454u), MAKE_ENT("link", "", 3321850u, 0u),
MAKE_STATIC_ENT(2, ":method", "POST", 3153018267u, 2461856u), MAKE_ENT("location", "", 1901043637u, 0u),
MAKE_STATIC_ENT(27, "content-length", "", 3162187450u, 0u), MAKE_ENT("max-forwards", "", 1619948695u, 0u),
MAKE_STATIC_ENT(19, "access-control-allow-origin", "", 3297999203u, 0u), MAKE_ENT("proxy-authenticate", "", 3993199572u, 0u),
MAKE_STATIC_ENT(5, ":scheme", "http", 3322585695u, 3213448u), MAKE_ENT("proxy-authorization", "", 329532250u, 0u),
MAKE_STATIC_ENT(6, ":scheme", "https", 3322585695u, 99617003u), MAKE_ENT("range", "", 108280125u, 0u),
MAKE_STATIC_ENT(7, ":status", "200", 3338091692u, 49586u), MAKE_ENT("referer", "", 1085069613u, 0u),
MAKE_STATIC_ENT(8, ":status", "204", 3338091692u, 49590u), MAKE_ENT("refresh", "", 1085444827u, 0u),
MAKE_STATIC_ENT(9, ":status", "206", 3338091692u, 49592u), MAKE_ENT("retry-after", "", 1933352567u, 0u),
MAKE_STATIC_ENT(10, ":status", "304", 3338091692u, 50551u), MAKE_ENT("server", "", 3389140803u, 0u),
MAKE_STATIC_ENT(11, ":status", "400", 3338091692u, 51508u), MAKE_ENT("set-cookie", "", 1237214767u, 0u),
MAKE_STATIC_ENT(12, ":status", "404", 3338091692u, 51512u), MAKE_ENT("strict-transport-security", "", 1153852136u, 0u),
MAKE_STATIC_ENT(13, ":status", "500", 3338091692u, 52469u), MAKE_ENT("transfer-encoding", "", 1274458357u, 0u),
MAKE_STATIC_ENT(53, "server", "", 3389140803u, 0u), MAKE_ENT("user-agent", "", 486342275u, 0u),
MAKE_STATIC_ENT(47, "proxy-authenticate", "", 3993199572u, 0u), MAKE_ENT("vary", "", 3612210u, 0u),
MAKE_STATIC_ENT(60, "www-authenticate", "", 4051929931u, 0u), MAKE_ENT("via", "", 116750u, 0u),
MAKE_STATIC_ENT(23, "cache-control", "", 4086191634u, 0u), MAKE_ENT("www-authenticate", "", 4051929931u, 0u),
MAKE_STATIC_ENT(15, "accept-encoding", "gzip, deflate", 4127597688u, 1733326877u),
};
/* Index to the position in static_table */
const size_t static_table_index[] = {
38, 43, 44, 10, 11, 47, 48, 49, 50, 51, 52, 53, 54, 55, 14, 60,
20, 26, 34, 46, 0 , 12, 36, 59, 41, 31, 42, 45, 32, 35, 19, 37,
2 , 3 , 40, 39, 4 , 5 , 8 , 33, 18, 9 , 27, 15, 6 , 29, 28, 57,
16, 13, 21, 22, 30, 56, 24, 23, 25, 17, 7 , 1 , 58
}; };
static const size_t STATIC_TABLE_LENGTH = static const size_t STATIC_TABLE_LENGTH =
@ -901,7 +892,6 @@ static search_result search_hd_table(nghttp2_hd_context *context,
size_t i; size_t i;
uint32_t name_hash = hash(nv->name, nv->namelen); uint32_t name_hash = hash(nv->name, nv->namelen);
uint32_t value_hash = hash(nv->value, nv->valuelen); uint32_t value_hash = hash(nv->value, nv->valuelen);
ssize_t left = -1, right = (ssize_t)STATIC_TABLE_LENGTH;
int use_index = (nv->flags & NGHTTP2_NV_FLAG_NO_INDEX) == 0; int use_index = (nv->flags & NGHTTP2_NV_FLAG_NO_INDEX) == 0;
if(use_index) { if(use_index) {
@ -920,33 +910,23 @@ static search_result search_hd_table(nghttp2_hd_context *context,
} }
} }
while(right - left > 1) { for(i = 0; i < STATIC_TABLE_LENGTH; ++i) {
ssize_t mid = (left + right) / 2; nghttp2_hd_entry *ent = &static_table[i];
nghttp2_hd_entry *ent = &static_table[mid].ent; if(ent->name_hash != name_hash || !name_eq(&ent->nv, nv)) {
if(ent->name_hash < name_hash) { continue;
left = mid;
} else {
right = mid;
}
} }
for(i = right; i < STATIC_TABLE_LENGTH; ++i) {
nghttp2_hd_entry *ent = &static_table[i].ent;
if(ent->name_hash != name_hash) {
break;
}
if(name_eq(&ent->nv, nv)) {
if(res.index == -1) { if(res.index == -1) {
res.index = (ssize_t)(context->hd_table.len + static_table[i].index); res.index = (ssize_t)(context->hd_table.len + i);
} }
if(use_index && if(use_index &&
ent->value_hash == value_hash && value_eq(&ent->nv, nv)) { ent->value_hash == value_hash && value_eq(&ent->nv, nv)) {
res.index = (ssize_t)(context->hd_table.len + static_table[i].index); res.index = (ssize_t)(context->hd_table.len + i);
res.name_value_match = 1; res.name_value_match = 1;
return res; return res;
} }
} }
}
return res; return res;
} }
@ -1012,8 +992,7 @@ nghttp2_hd_entry* nghttp2_hd_table_get(nghttp2_hd_context *context,
if(idx < context->hd_table.len) { if(idx < context->hd_table.len) {
return hd_ringbuf_get(&context->hd_table, idx); return hd_ringbuf_get(&context->hd_table, idx);
} else { } else {
return return &static_table[idx - context->hd_table.len];
&static_table[static_table_index[idx - context->hd_table.len]].ent;
} }
} }

5
lib/nghttp2_hd.h
View File

@ -81,11 +81,6 @@ typedef struct {
uint8_t flags; uint8_t flags;
} nghttp2_hd_entry; } nghttp2_hd_entry;
typedef struct {
nghttp2_hd_entry ent;
size_t index;
} nghttp2_hd_static_entry;
typedef struct { typedef struct {
nghttp2_hd_entry **buffer; nghttp2_hd_entry **buffer;
size_t mask; size_t mask;

25
mkstatichdtbl.py
View File

@ -13,27 +13,8 @@ for line in sys.stdin:
val = m.group(3).strip() if m.group(3) else '' val = m.group(3).strip() if m.group(3) else ''
entries.append((hash(m.group(2)), int(m.group(1)), m.group(2), val)) entries.append((hash(m.group(2)), int(m.group(1)), m.group(2), val))
entries.sort() print 'static nghttp2_hd_entry static_table[] = {'
print '/* Sorted by hash(name) and its table index */'
print 'static nghttp2_hd_static_entry static_table[] = {'
for ent in entries: for ent in entries:
print 'MAKE_STATIC_ENT({}, "{}", "{}", {}u, {}u),'\ print 'MAKE_ENT("{}", "{}", {}u, {}u),'\
.format(ent[1] - 1, ent[2], ent[3], ent[0], hash(ent[3])) .format(ent[2], ent[3], ent[0], hash(ent[3]))
print '};'
print ''
print '/* Index to the position in static_table */'
print 'const size_t static_table_index[] = {'
for i in range(len(entries)):
for j, ent in enumerate(entries):
if ent[1] - 1 == i:
sys.stdout.write('{: <2d},'.format(j))
break
if (i + 1) % 16 == 0:
sys.stdout.write('\n')
else:
sys.stdout.write(' ')
print '};' print '};'