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annotate src/http/ngx_http_cache.c @ 170:c42be4185301

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nginx-0.0.1-2003-11-03-01:56:18 import
author Igor Sysoev <igor@sysoev.ru>
date Sun, 02 Nov 2003 22:56:18 +0000
parents b5be4b0448d3
children aff0e5d32af8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
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1
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2 #include <ngx_config.h>
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3 #include <ngx_core.h>
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4 #include <ngx_http.h>
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5
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6 #include <md5.h>
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7
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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9 int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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10 {
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11 int small;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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12 ssize_t n, len;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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13 MD5_CTX md5;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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14 ngx_err_t err;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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15 ngx_str_t key;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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16 ngx_http_bin_cache_t *h;
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17
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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18 ctx->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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19 if (!(ctx->file.name.data = ngx_palloc(r->pool, ctx->file.name.len + 1))) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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20 return NGX_ERROR;
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21 }
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22
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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23 ngx_memcpy(ctx->file.name.data, ctx->path->name.data, ctx->path->name.len);
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24
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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25 MD5Init(&md5);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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26 MD5Update(&md5, (u_char *) ctx->key.data, ctx->key.len);
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27 MD5End(&md5,
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28 ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
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29
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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30 ngx_log_debug(r->connection->log, "URL: %s, md5: %s" _ ctx->key.data _
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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31 ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
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32
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33 ngx_create_hashed_filename(&ctx->file, ctx->path);
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34
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35 ngx_log_debug(r->connection->log, "FILE: %s" _ ctx->file.name.data);
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36
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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37 /* TODO: look open files cache */
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38
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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39 ctx->file.fd = ngx_open_file(ctx->file.name.data,
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40 NGX_FILE_RDONLY, NGX_FILE_OPEN);
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41
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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42 if (ctx->file.fd == NGX_INVALID_FILE) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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43 err = ngx_errno;
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44
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45 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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46
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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47 /* TODO: text size */
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48
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49 ctx->header.size = 2 * sizeof(ssize_t)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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50 + sizeof(ngx_http_cache_header_t)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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51 + ctx->key.len + 1;
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52
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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53 return NGX_DECLINED;
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54 }
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55
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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56 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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57 ngx_open_file_n " \"%s\" failed", ctx->file.name.data);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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58 return NGX_ERROR;
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59 }
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60
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61 n = ngx_read_file(&ctx->file, ctx->buf->pos,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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62 ctx->buf->end - ctx->buf->last, 0);
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63
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64 if (n == NGX_ERROR || n == NGX_AGAIN) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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65 return n;
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66 }
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67
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68 len = 0;
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69 small = 1;
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70
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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71 if (n > 1) {
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72 if (ctx->buf->pos[0] == 'T') {
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73 /* STUB */
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74 return NGX_ERROR;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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75
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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76 } else if (ctx->buf->pos[0] == 'B') {
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77
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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78 len = sizeof(ngx_http_bin_cache_t);
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79
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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80 if (n > len) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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81 h = (ngx_http_bin_cache_t *) ctx->buf->pos;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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82 key.len = h->key_len;
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83
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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84 if (n >= len + (ssize_t) key.len + 1) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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85 ctx->header = h->header;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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86 key.data = h->key;
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87
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88 small = 0;
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89 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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90 }
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91
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92 } else {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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93 ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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94 "unknown type of cache file \"%s\"",
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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95 ctx->file.name.data);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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96 return NGX_ERROR;
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97 }
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98
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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99 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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100
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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101 if (small) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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102 ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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103 "cache file \"%s\" is to small", ctx->file.name.data);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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104 return NGX_ERROR;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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105 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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106
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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107 if (key.len != ctx->key.len
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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108 || ngx_strncmp(key.data, ctx->key.data, key.len) != 0)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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109 {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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110 key.data[key.len] = '\0';
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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111 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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112 "md5 collision: \"%s\" and \"%s\"",
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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113 key.data, ctx->key.data);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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114 return NGX_DECLINED;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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115 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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116
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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117 ctx->header.size = len + key.len + 1;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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118 ctx->buf->last += n;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
119
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
120 return NGX_OK;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
121 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
122
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
123
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
124 int ngx_http_cache_update_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
125 ngx_str_t *temp_file)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
126 {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
127 int retry;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
128 ngx_err_t err;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
129
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
130 retry = 0;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
131
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
132 for ( ;; ) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
133 if (ngx_rename_file(temp_file->data, ctx->file.name.data)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
134 != NGX_FILE_ERROR)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
135 {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
136 return NGX_OK;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
137 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
138
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
139 err = ngx_errno;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
140
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
141 if (retry || (err != NGX_ENOENT && err != NGX_ENOTDIR)) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
142 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
143 ngx_rename_file_n "(\"%s\", \"%s\") failed",
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
144 temp_file->data, ctx->file.name.data);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
145
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
146 return NGX_ERROR;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
147 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
148
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
149 if (ngx_create_path(&ctx->file, ctx->path) == NGX_ERROR) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
150 return NGX_ERROR;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
151 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
152
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
153 retry = 1;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
154 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
155 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
156
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
157
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
158 #if 0
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
159
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
160 /*
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
161 * small file in malloc()ed memory, mmap()ed file, file descriptor only,
105
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
162 * file access time only (to estimate could pages still be in memory),
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
163 * translated URI (ngx_http_index_hanlder),
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
164 * compiled script (ngx_http_ssi_filter).
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
165 */
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
166
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
167
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
168 #define NGX_HTTP_CACHE_ENTRY_DELETED 0x00000001
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
169 #define NGX_HTTP_CACHE_ENTRY_MMAPED 0x00000002
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
170
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
171 /* "/" -> "/index.html" in ngx_http_index_handler */
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
172 #define NGX_HTTP_CACHE_ENTRY_URI 0x00000004
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
173
105
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
174 /* 301 location "/dir" -> "dir/" in ngx_http_core_handler */
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
175
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
176 /* compiled script in ngx_http_ssi_filter */
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
177 #define NGX_HTTP_CACHE_ENTRY_SCRIPT 0x00000008
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
178
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
179 #define NGX_HTTP_CACHE_FILTER_FLAGS 0xFFFF0000
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
180
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
181
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
182 typedef struct {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
183 ngx_fd_t fd;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
184 off_t size;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
185 void *data;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
186 time_t accessed;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
187 time_t last_modified;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
188 time_t updated; /* no needed with kqueue */
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
189 int refs;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
190 int flags;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
191 } ngx_http_cache_entry_t;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
192
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
193
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
194 typedef struct {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
195 u_int32_t crc;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
196 ngx_str_t uri;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
197 ngx_http_cache_t *cache;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
198 } ngx_http_cache_hash_entry_t;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
199
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
200
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
201 typedef struct {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
202 ngx_http_cache_t *cache;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
203 u_int32_t crc;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
204 int n;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
205 } ngx_http_cache_handle_t;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
206
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
207
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
208 int ngx_http_cache_get(ngx_http_cache_hash_t *cache_hash,
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
209 ngx_str_t *uri, ngx_http_cache_handle_t *h)
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210 {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 int hi;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
212 ngx_http_cache_hash_entry_t *entry;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
213
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
214 h->crc = ngx_crc(uri->data, uri->len);
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216 hi = h->crc % cache_hash->size;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
217 entry = cache_hash[hi].elts;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
218
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
219 for (i = 0; i < cache_hash[hi].nelts; i++) {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
220 if (entry[i].crc == crc
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
221 && entry[i].uri.len == uri->len
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
222 && ngx_strncmp(entry[i].uri.data, uri->data, uri->len) == 0
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
223 {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
224 h->cache = entry[i].cache;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
225 h->cache->refs++;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
226 h->n = hi;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
227 return NGX_OK;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
228 }
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229 }
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
231 return NGX_ERROR;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232 }
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
233
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
234
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
235 /* 32-bit crc16 */
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
236
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
237 int ngx_crc(char *data, size_t len)
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
238 {
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
239 u_int32_t sum;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
240
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
241 for (sum = 0; len; len--) {
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
242 /*
107
b5be4b0448d3 nginx-0.0.1-2003-07-01-19:00:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 105
diff changeset
243 * gcc 2.95.2 x86 and icc 7.1.006 compile that operator
b5be4b0448d3 nginx-0.0.1-2003-07-01-19:00:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 105
diff changeset
244 * into the single rol opcode.
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
245 * msvc 6.0sp2 compiles it into four opcodes.
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
246 */
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
247 sum = sum >> 1 | sum << 31;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
248
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
249 sum += *data++;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
250 }
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
251
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
252 return sum;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
253 }
170
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
254
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
255 #endif