Mercurial > hg > nginx
annotate src/http/ngx_http_cache.c @ 186:c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Sun, 16 Nov 2003 21:49:42 +0000 |
parents | d5f50cefc322 |
children | c966c09be66b |
rev | line source |
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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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8 #if (HAVE_OPENSSL_MD5) |
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9 #define MD5Init MD5_Init |
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10 #define MD5Update MD5_Update |
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11 #define MD5Final MD5_Final |
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12 #endif |
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14 |
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15 int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx) |
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16 { |
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17 MD5_CTX md5; |
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19 ctx->header_size = sizeof(ngx_http_cache_header_t) + ctx->key.len + 1; |
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20 |
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21 ctx->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32; |
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22 if (!(ctx->file.name.data = ngx_palloc(r->pool, ctx->file.name.len + 1))) { |
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23 return NGX_ERROR; |
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24 } |
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26 ngx_memcpy(ctx->file.name.data, ctx->path->name.data, ctx->path->name.len); |
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27 |
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28 MD5Init(&md5); |
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29 MD5Update(&md5, (u_char *) ctx->key.data, ctx->key.len); |
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30 MD5Final(ctx->md5, &md5); |
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32 ngx_md5_text(ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len, |
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33 ctx->md5); |
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34 |
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35 ngx_log_debug(r->connection->log, "URL: %s, md5: %s" _ ctx->key.data _ |
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36 ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len); |
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37 |
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38 ngx_create_hashed_filename(&ctx->file, ctx->path); |
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39 |
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40 ngx_log_debug(r->connection->log, "FILE: %s" _ ctx->file.name.data); |
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41 |
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42 /* TODO: look open files cache */ |
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44 return ngx_http_cache_open_file(r, ctx, 0); |
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45 } |
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46 |
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48 /* TODO: Win32 inode analogy */ |
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50 int ngx_http_cache_open_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx, |
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51 ngx_file_uniq_t uniq) |
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52 { |
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53 ssize_t n; |
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54 ngx_err_t err; |
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55 ngx_http_cache_header_t *h; |
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56 |
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57 ctx->file.fd = ngx_open_file(ctx->file.name.data, |
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58 NGX_FILE_RDONLY, NGX_FILE_OPEN); |
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59 |
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60 if (ctx->file.fd == NGX_INVALID_FILE) { |
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61 err = ngx_errno; |
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62 |
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63 if (err == NGX_ENOENT || err == NGX_ENOTDIR) { |
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64 return NGX_DECLINED; |
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65 } |
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66 |
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67 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno, |
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68 ngx_open_file_n " \"%s\" failed", ctx->file.name.data); |
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69 return NGX_ERROR; |
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70 } |
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72 if (uniq) { |
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73 if (ngx_fd_info(ctx->file.fd, &ctx->file.info) == NGX_FILE_ERROR) { |
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74 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno, |
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75 ngx_fd_info_n " \"%s\" failed", ctx->file.name.data); |
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76 |
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77 return NGX_ERROR; |
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78 } |
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79 |
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80 if (ngx_file_uniq(&ctx->file.info) == uniq) { |
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81 if (ngx_close_file(ctx->file.fd) == NGX_FILE_ERROR) { |
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82 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno, |
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83 ngx_close_file_n " \"%s\" failed", |
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84 ctx->file.name.data); |
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85 } |
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86 |
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87 return NGX_HTTP_CACHE_THE_SAME; |
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88 } |
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89 } |
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90 |
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91 n = ngx_read_file(&ctx->file, ctx->buf->pos, |
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92 ctx->buf->end - ctx->buf->last, 0); |
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93 |
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94 if (n == NGX_ERROR || n == NGX_AGAIN) { |
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95 return n; |
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96 } |
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97 |
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98 if (n <= ctx->header_size) { |
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99 ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0, |
171
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
100 "cache file \"%s\" is too small", ctx->file.name.data); |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
101 return NGX_ERROR; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
102 } |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
103 |
174
ea464a6c0581
nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents:
172
diff
changeset
|
104 h = (ngx_http_cache_header_t *) ctx->buf->pos; |
ea464a6c0581
nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents:
172
diff
changeset
|
105 ctx->expires = h->expires; |
ea464a6c0581
nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents:
172
diff
changeset
|
106 ctx->last_modified= h->last_modified; |
ea464a6c0581
nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents:
172
diff
changeset
|
107 ctx->date = h->date; |
ea464a6c0581
nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents:
172
diff
changeset
|
108 ctx->length = h->length; |
171
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
109 |
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
110 if (h->key_len != ctx->key.len |
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
111 || ngx_strncmp(h->key, ctx->key.data, h->key_len) != 0) |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
112 { |
171
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
113 h->key[h->key_len] = '\0'; |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
114 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
115 "md5 collision: \"%s\" and \"%s\"", |
171
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
116 h->key, ctx->key.data); |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
117 return NGX_DECLINED; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
118 } |
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 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
|
121 |
174
ea464a6c0581
nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents:
172
diff
changeset
|
122 if (ctx->expires < ngx_time()) { |
175
e92c2c647c57
nginx-0.0.1-2003-11-05-20:03:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
174
diff
changeset
|
123 ngx_log_debug(r->connection->log, "EXPIRED"); |
172
caa57ddf6d77
nginx-0.0.1-2003-11-04-01:20:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
171
diff
changeset
|
124 return NGX_HTTP_CACHE_STALE; |
171
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
125 } |
aff0e5d32af8
nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents:
170
diff
changeset
|
126 |
172
caa57ddf6d77
nginx-0.0.1-2003-11-04-01:20:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
171
diff
changeset
|
127 /* TODO: NGX_HTTP_CACHE_AGED */ |
caa57ddf6d77
nginx-0.0.1-2003-11-04-01:20:44 import
Igor Sysoev <igor@sysoev.ru>
parents:
171
diff
changeset
|
128 |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
129 return NGX_OK; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
130 } |
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 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
133 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
|
134 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
|
135 { |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
136 int retry; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
137 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
|
138 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
139 retry = 0; |
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 for ( ;; ) { |
186
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
142 if (ngx_rename_file(temp_file->data, ctx->file.name.data) == NGX_OK) { |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
143 return NGX_OK; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
144 } |
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 err = ngx_errno; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
147 |
186
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
148 #if (WIN32) |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
149 if (err == NGX_EEXIST) { |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
150 if (ngx_win32_rename_file(temp_file, &ctx->file.name, r->pool) |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
151 == NGX_ERROR) |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
152 { |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
153 return NGX_ERROR; |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
154 } |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
155 } |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
156 #endif |
c1f3a3c7c5db
nginx-0.0.1-2003-11-17-00:49:42 import
Igor Sysoev <igor@sysoev.ru>
parents:
185
diff
changeset
|
157 |
170
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
158 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
|
159 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
|
160 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
|
161 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
|
162 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
163 return NGX_ERROR; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
164 } |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
165 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
166 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
|
167 return NGX_ERROR; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
168 } |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
169 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
170 retry = 1; |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
171 } |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
172 } |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
173 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
174 |
c42be4185301
nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
107
diff
changeset
|
175 #if 0 |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
176 |
99
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
177 /* |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
178 * 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
|
179 * 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
|
180 * 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
|
181 * 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
|
182 */ |
a059e1aa65d4
nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents:
97
diff
changeset
|
183 |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
184 |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
185 #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
|
186 #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
|
187 |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
188 /* "/" -> "/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
|
189 #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
|
190 |
105
00bee6e7b485
nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
99
diff
changeset
|
191 /* 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
|
192 |
00bee6e7b485
nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
99
diff
changeset
|
193 /* 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
|
194 #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
|
195 |
97
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
196 #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
|
197 |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
198 |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 typedef struct { |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
200 ngx_fd_t fd; |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
201 off_t size; |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
202 void *data; |
70d2345a903f
nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
203 time_t accessed; |
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nginx-0.0.1-2003-05-29-17:02:09 import
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204 time_t last_modified; |
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205 time_t updated; /* no needed with kqueue */ |
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206 int refs; |
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207 int flags; |
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208 } ngx_http_cache_entry_t; |
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209 |
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210 |
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211 typedef struct { |
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212 u_int32_t crc; |
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213 ngx_str_t uri; |
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214 ngx_http_cache_t *cache; |
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215 } ngx_http_cache_hash_entry_t; |
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216 |
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217 |
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218 typedef struct { |
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219 ngx_http_cache_t *cache; |
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220 u_int32_t crc; |
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221 int n; |
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222 } ngx_http_cache_handle_t; |
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223 |
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224 |
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225 int ngx_http_cache_get(ngx_http_cache_hash_t *cache_hash, |
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226 ngx_str_t *uri, ngx_http_cache_handle_t *h) |
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227 { |
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228 int hi; |
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229 ngx_http_cache_hash_entry_t *entry; |
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230 |
99
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231 h->crc = ngx_crc(uri->data, uri->len); |
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232 |
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233 hi = h->crc % cache_hash->size; |
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234 entry = cache_hash[hi].elts; |
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235 |
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236 for (i = 0; i < cache_hash[hi].nelts; i++) { |
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237 if (entry[i].crc == crc |
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238 && entry[i].uri.len == uri->len |
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239 && ngx_strncmp(entry[i].uri.data, uri->data, uri->len) == 0 |
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240 { |
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241 h->cache = entry[i].cache; |
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242 h->cache->refs++; |
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243 h->n = hi; |
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244 return NGX_OK; |
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245 } |
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246 } |
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247 |
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248 return NGX_ERROR; |
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249 } |
99
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250 |
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251 |
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252 /* 32-bit crc16 */ |
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253 |
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254 int ngx_crc(char *data, size_t len) |
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255 { |
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256 u_int32_t sum; |
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257 |
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258 for (sum = 0; len; len--) { |
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259 /* |
107
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260 * gcc 2.95.2 x86 and icc 7.1.006 compile that operator |
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261 * into the single rol opcode. |
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262 * msvc 6.0sp2 compiles it into four opcodes. |
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263 */ |
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264 sum = sum >> 1 | sum << 31; |
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265 |
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266 sum += *data++; |
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267 } |
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268 |
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269 return sum; |
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270 } |
170
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271 |
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272 #endif |