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src/http/modules/ngx_http_dav_module.c - nginx-1.7.10

Global variables defined

Data types defined

Functions defined

Macros defined

Source code


  2. /*
  3. * Copyright (C) Igor Sysoev
  4. * Copyright (C) Nginx, Inc.
  5. */


  8. #include <ngx_config.h>
  9. #include <ngx_core.h>
  10. #include <ngx_http.h>


  13. ‌#define NGX_HTTP_DAV_OFF             2


  16. ‌#define NGX_HTTP_DAV_NO_DEPTH        -3
  17. ‌#define NGX_HTTP_DAV_INVALID_DEPTH   -2
  18. ‌#define NGX_HTTP_DAV_INFINITY_DEPTH  -1


  21. typedef struct {
  22.     ngx_uint_t  methods;
  23.     ngx_uint_t  access;
  24.     ngx_uint_t  min_delete_depth;
  25.     ngx_flag_t  create_full_put_path;
  26. ‌} ngx_http_dav_loc_conf_t;


  29. typedef struct {
  30.     ngx_str_t   path;
  31.     size_t      len;
  32. ‌} ngx_http_dav_copy_ctx_t;


  35. static ngx_int_t ngx_http_dav_handler(ngx_http_request_t *r);

  37. static void ngx_http_dav_put_handler(ngx_http_request_t *r);

  39. static ngx_int_t ngx_http_dav_delete_handler(ngx_http_request_t *r);
  40. static ngx_int_t ngx_http_dav_delete_path(ngx_http_request_t *r,
  41.     ngx_str_t *path, ngx_uint_t dir);
  42. static ngx_int_t ngx_http_dav_delete_dir(ngx_tree_ctx_t *ctx, ngx_str_t *path);
  43. static ngx_int_t ngx_http_dav_delete_file(ngx_tree_ctx_t *ctx, ngx_str_t *path);
  44. static ngx_int_t ngx_http_dav_noop(ngx_tree_ctx_t *ctx, ngx_str_t *path);

  46. static ngx_int_t ngx_http_dav_mkcol_handler(ngx_http_request_t *r,
  47.     ngx_http_dav_loc_conf_t *dlcf);

  49. static ngx_int_t ngx_http_dav_copy_move_handler(ngx_http_request_t *r);
  50. static ngx_int_t ngx_http_dav_copy_dir(ngx_tree_ctx_t *ctx, ngx_str_t *path);
  51. static ngx_int_t ngx_http_dav_copy_dir_time(ngx_tree_ctx_t *ctx,
  52.     ngx_str_t *path);
  53. static ngx_int_t ngx_http_dav_copy_tree_file(ngx_tree_ctx_t *ctx,
  54.     ngx_str_t *path);

  56. static ngx_int_t ngx_http_dav_depth(ngx_http_request_t *r, ngx_int_t dflt);
  57. static ngx_int_t ngx_http_dav_error(ngx_log_t *log, ngx_err_t err,
  58.     ngx_int_t not_found, char *failed, u_char *path);
  59. static ngx_int_t ngx_http_dav_location(ngx_http_request_t *r, u_char *path);
  60. static void *ngx_http_dav_create_loc_conf(ngx_conf_t *cf);
  61. static char *ngx_http_dav_merge_loc_conf(ngx_conf_t *cf,
  62.     void *parent, void *child);
  63. static ngx_int_t ngx_http_dav_init(ngx_conf_t *cf);


  66. ‌static ngx_conf_bitmask_t  ngx_http_dav_methods_mask[] = {
  67.     { ngx_string("off"), NGX_HTTP_DAV_OFF },
  68.     { ngx_string("put"), NGX_HTTP_PUT },
  69.     { ngx_string("delete"), NGX_HTTP_DELETE },
  70.     { ngx_string("mkcol"), NGX_HTTP_MKCOL },
  71.     { ngx_string("copy"), NGX_HTTP_COPY },
  72.     { ngx_string("move"), NGX_HTTP_MOVE },
  73.     { ngx_null_string, 0 }
  74. };


  77. ‌static ngx_command_t  ngx_http_dav_commands[] = {

  79.     { ngx_string("dav_methods"),
  80.       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
  81.       ngx_conf_set_bitmask_slot,
  82.       NGX_HTTP_LOC_CONF_OFFSET,
  83.       offsetof(ngx_http_dav_loc_conf_t, methods),
  84.       &ngx_http_dav_methods_mask },

  86.     { ngx_string("create_full_put_path"),
  87.       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
  88.       ngx_conf_set_flag_slot,
  89.       NGX_HTTP_LOC_CONF_OFFSET,
  90.       offsetof(ngx_http_dav_loc_conf_t, create_full_put_path),
  91.       NULL },

  93.     { ngx_string("min_delete_depth"),
  94.       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
  95.       ngx_conf_set_num_slot,
  96.       NGX_HTTP_LOC_CONF_OFFSET,
  97.       offsetof(ngx_http_dav_loc_conf_t, min_delete_depth),
  98.       NULL },

  100.     { ngx_string("dav_access"),
  101.       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
  102.       ngx_conf_set_access_slot,
  103.       NGX_HTTP_LOC_CONF_OFFSET,
  104.       offsetof(ngx_http_dav_loc_conf_t, access),
  105.       NULL },

  107.       ngx_null_command
  108. };


  111. ‌static ngx_http_module_t  ngx_http_dav_module_ctx = {
  112.     NULL,                                  /* preconfiguration */
  113.     ngx_http_dav_init,                     /* postconfiguration */

  115.     NULL,                                  /* create main configuration */
  116.     NULL,                                  /* init main configuration */

  118.     NULL,                                  /* create server configuration */
  119.     NULL,                                  /* merge server configuration */

  121.     ngx_http_dav_create_loc_conf,          /* create location configuration */
  122.     ngx_http_dav_merge_loc_conf            /* merge location configuration */
  123. };


  126. ‌ngx_module_t  ngx_http_dav_module = {
  127.     NGX_MODULE_V1,
  128.     &ngx_http_dav_module_ctx,              /* module context */
  129.     ngx_http_dav_commands,                 /* module directives */
  130.     NGX_HTTP_MODULE,                       /* module type */
  131.     NULL,                                  /* init master */
  132.     NULL,                                  /* init module */
  133.     NULL,                                  /* init process */
  134.     NULL,                                  /* init thread */
  135.     NULL,                                  /* exit thread */
  136.     NULL,                                  /* exit process */
  137.     NULL,                                  /* exit master */
  138.     NGX_MODULE_V1_PADDING
  139. };


  142. static ngx_int_t
  143. ‌ngx_http_dav_handler(ngx_http_request_t *r)
  144. {
  145.     ngx_int_t                 rc;
  146.     ngx_http_dav_loc_conf_t  *dlcf;

  148.     dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  150.     if (!(r->method & dlcf->methods)) {
  151.         return NGX_DECLINED;
  152.     }

  154.     switch (r->method) {

  156.     case NGX_HTTP_PUT:

  158.         if (r->uri.data[r->uri.len - 1] == '/') {
  159.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  160.                           "cannot PUT to a collection");
  161.             return NGX_HTTP_CONFLICT;
  162.         }

  164.         r->request_body_in_file_only = 1;
  165.         r->request_body_in_persistent_file = 1;
  166.         r->request_body_in_clean_file = 1;
  167.         r->request_body_file_group_access = 1;
  168.         r->request_body_file_log_level = 0;

  170.         rc = ngx_http_read_client_request_body(r, ngx_http_dav_put_handler);

  172.         if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
  173.             return rc;
  174.         }

  176.         return NGX_DONE;

  178.     case NGX_HTTP_DELETE:

  180.         return ngx_http_dav_delete_handler(r);

  182.     case NGX_HTTP_MKCOL:

  184.         return ngx_http_dav_mkcol_handler(r, dlcf);

  186.     case NGX_HTTP_COPY:

  188.         return ngx_http_dav_copy_move_handler(r);

  190.     case NGX_HTTP_MOVE:

  192.         return ngx_http_dav_copy_move_handler(r);
  193.     }

  195.     return NGX_DECLINED;
  196. }


  199. static void
  200. ‌ngx_http_dav_put_handler(ngx_http_request_t *r)
  201. {
  202.     size_t                    root;
  203.     time_t                    date;
  204.     ngx_str_t                *temp, path;
  205.     ngx_uint_t                status;
  206.     ngx_file_info_t           fi;
  207.     ngx_ext_rename_file_t     ext;
  208.     ngx_http_dav_loc_conf_t  *dlcf;

  210.     if (r->request_body == NULL || r->request_body->temp_file == NULL) {
  211.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  212.         return;
  213.     }

  215.     if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
  216.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  217.         return;
  218.     }

  220.     path.len--;

  222.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
  223.                    "http put filename: \"%s\"", path.data);

  225.     temp = &r->request_body->temp_file->file.name;

  227.     if (ngx_file_info(path.data, &fi) == NGX_FILE_ERROR) {
  228.         status = NGX_HTTP_CREATED;

  230.     } else {
  231.         status = NGX_HTTP_NO_CONTENT;

  233.         if (ngx_is_dir(&fi)) {
  234.             ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_EISDIR,
  235.                           "\"%s\" could not be created", path.data);

  237.             if (ngx_delete_file(temp->data) == NGX_FILE_ERROR) {
  238.                 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
  239.                               ngx_delete_file_n " \"%s\" failed",
  240.                               temp->data);
  241.             }

  243.             ngx_http_finalize_request(r, NGX_HTTP_CONFLICT);
  244.             return;
  245.         }
  246.     }

  248.     dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  250.     ext.access = dlcf->access;
  251.     ext.path_access = dlcf->access;
  252.     ext.time = -1;
  253.     ext.create_path = dlcf->create_full_put_path;
  254.     ext.delete_file = 1;
  255.     ext.log = r->connection->log;

  257.     if (r->headers_in.date) {
  258.         date = ngx_http_parse_time(r->headers_in.date->value.data,
  259.                                    r->headers_in.date->value.len);

  261.         if (date != NGX_ERROR) {
  262.             ext.time = date;
  263.             ext.fd = r->request_body->temp_file->file.fd;
  264.         }
  265.     }

  267.     if (ngx_ext_rename_file(temp, &path, &ext) != NGX_OK) {
  268.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  269.         return;
  270.     }

  272.     if (status == NGX_HTTP_CREATED) {
  273.         if (ngx_http_dav_location(r, path.data) != NGX_OK) {
  274.             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  275.             return;
  276.         }

  278.         r->headers_out.content_length_n = 0;
  279.     }

  281.     r->headers_out.status = status;
  282.     r->header_only = 1;

  284.     ngx_http_finalize_request(r, ngx_http_send_header(r));
  285.     return;
  286. }


  289. static ngx_int_t
  290. ‌ngx_http_dav_delete_handler(ngx_http_request_t *r)
  291. {
  292.     size_t                    root;
  293.     ngx_err_t                 err;
  294.     ngx_int_t                 rc, depth;
  295.     ngx_uint_t                i, d, dir;
  296.     ngx_str_t                 path;
  297.     ngx_file_info_t           fi;
  298.     ngx_http_dav_loc_conf_t  *dlcf;

  300.     if (r->headers_in.content_length_n > 0) {
  301.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  302.                       "DELETE with body is unsupported");
  303.         return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
  304.     }

  306.     dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  308.     if (dlcf->min_delete_depth) {
  309.         d = 0;

  311.         for (i = 0; i < r->uri.len; /* void */) {
  312.             if (r->uri.data[i++] == '/') {
  313.                 if (++d >= dlcf->min_delete_depth && i < r->uri.len) {
  314.                     goto ok;
  315.                 }
  316.             }
  317.         }

  319.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  320.                       "insufficient URI depth:%i to DELETE", d);
  321.         return NGX_HTTP_CONFLICT;
  322.     }

  324. ok:

  326.     if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
  327.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  328.     }

  330.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
  331.                    "http delete filename: \"%s\"", path.data);

  333.     if (ngx_link_info(path.data, &fi) == NGX_FILE_ERROR) {
  334.         err = ngx_errno;

  336.         rc = (err == NGX_ENOTDIR) ? NGX_HTTP_CONFLICT : NGX_HTTP_NOT_FOUND;

  338.         return ngx_http_dav_error(r->connection->log, err,
  339.                                   rc, ngx_link_info_n, path.data);
  340.     }

  342.     if (ngx_is_dir(&fi)) {

  344.         if (r->uri.data[r->uri.len - 1] != '/') {
  345.             ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_EISDIR,
  346.                           "DELETE \"%s\" failed", path.data);
  347.             return NGX_HTTP_CONFLICT;
  348.         }

  350.         depth = ngx_http_dav_depth(r, NGX_HTTP_DAV_INFINITY_DEPTH);

  352.         if (depth != NGX_HTTP_DAV_INFINITY_DEPTH) {
  353.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  354.                           "\"Depth\" header must be infinity");
  355.             return NGX_HTTP_BAD_REQUEST;
  356.         }

  358.         path.len -= 2;  /* omit "/\0" */

  360.         dir = 1;

  362.     } else {

  364.         /*
  365.          * we do not need to test (r->uri.data[r->uri.len - 1] == '/')
  366.          * because ngx_link_info("/file/") returned NGX_ENOTDIR above
  367.          */

  369.         depth = ngx_http_dav_depth(r, 0);

  371.         if (depth != 0 && depth != NGX_HTTP_DAV_INFINITY_DEPTH) {
  372.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  373.                           "\"Depth\" header must be 0 or infinity");
  374.             return NGX_HTTP_BAD_REQUEST;
  375.         }

  377.         dir = 0;
  378.     }

  380.     rc = ngx_http_dav_delete_path(r, &path, dir);

  382.     if (rc == NGX_OK) {
  383.         return NGX_HTTP_NO_CONTENT;
  384.     }

  386.     return rc;
  387. }


  390. static ngx_int_t
  391. ‌ngx_http_dav_delete_path(ngx_http_request_t *r, ngx_str_t *path, ngx_uint_t dir)
  392. {
  393.     char            *failed;
  394.     ngx_tree_ctx_t   tree;

  396.     if (dir) {

  398.         tree.init_handler = NULL;
  399.         tree.file_handler = ngx_http_dav_delete_file;
  400.         tree.pre_tree_handler = ngx_http_dav_noop;
  401.         tree.post_tree_handler = ngx_http_dav_delete_dir;
  402.         tree.spec_handler = ngx_http_dav_delete_file;
  403.         tree.data = NULL;
  404.         tree.alloc = 0;
  405.         tree.log = r->connection->log;

  407.         /* TODO: 207 */

  409.         if (ngx_walk_tree(&tree, path) != NGX_OK) {
  410.             return NGX_HTTP_INTERNAL_SERVER_ERROR;
  411.         }

  413.         if (ngx_delete_dir(path->data) != NGX_FILE_ERROR) {
  414.             return NGX_OK;
  415.         }

  417.         failed = ngx_delete_dir_n;

  419.     } else {

  421.         if (ngx_delete_file(path->data) != NGX_FILE_ERROR) {
  422.             return NGX_OK;
  423.         }

  425.         failed = ngx_delete_file_n;
  426.     }

  428.     return ngx_http_dav_error(r->connection->log, ngx_errno,
  429.                               NGX_HTTP_NOT_FOUND, failed, path->data);
  430. }


  433. static ngx_int_t
  434. ‌ngx_http_dav_delete_dir(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  435. {
  436.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  437.                    "http delete dir: \"%s\"", path->data);

  439.     if (ngx_delete_dir(path->data) == NGX_FILE_ERROR) {

  441.         /* TODO: add to 207 */

  443.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_delete_dir_n,
  444.                                   path->data);
  445.     }

  447.     return NGX_OK;
  448. }


  451. static ngx_int_t
  452. ‌ngx_http_dav_delete_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  453. {
  454.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  455.                    "http delete file: \"%s\"", path->data);

  457.     if (ngx_delete_file(path->data) == NGX_FILE_ERROR) {

  459.         /* TODO: add to 207 */

  461.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_delete_file_n,
  462.                                   path->data);
  463.     }

  465.     return NGX_OK;
  466. }


  469. static ngx_int_t
  470. ‌ngx_http_dav_noop(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  471. {
  472.     return NGX_OK;
  473. }


  476. static ngx_int_t
  477. ‌ngx_http_dav_mkcol_handler(ngx_http_request_t *r, ngx_http_dav_loc_conf_t *dlcf)
  478. {
  479.     u_char    *p;
  480.     size_t     root;
  481.     ngx_str_t  path;

  483.     if (r->headers_in.content_length_n > 0) {
  484.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  485.                       "MKCOL with body is unsupported");
  486.         return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
  487.     }

  489.     if (r->uri.data[r->uri.len - 1] != '/') {
  490.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  491.                       "MKCOL can create a collection only");
  492.         return NGX_HTTP_CONFLICT;
  493.     }

  495.     p = ngx_http_map_uri_to_path(r, &path, &root, 0);
  496.     if (p == NULL) {
  497.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  498.     }

  500.     *(p - 1) = '\0';
  501.     r->uri.len--;

  503.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
  504.                    "http mkcol path: \"%s\"", path.data);

  506.     if (ngx_create_dir(path.data, ngx_dir_access(dlcf->access))
  507.         != NGX_FILE_ERROR)
  508.     {
  509.         if (ngx_http_dav_location(r, path.data) != NGX_OK) {
  510.             return NGX_HTTP_INTERNAL_SERVER_ERROR;
  511.         }

  513.         return NGX_HTTP_CREATED;
  514.     }

  516.     return ngx_http_dav_error(r->connection->log, ngx_errno,
  517.                               NGX_HTTP_CONFLICT, ngx_create_dir_n, path.data);
  518. }


  521. static ngx_int_t
  522. ‌ngx_http_dav_copy_move_handler(ngx_http_request_t *r)
  523. {
  524.     u_char                   *p, *host, *last, ch;
  525.     size_t                    len, root;
  526.     ngx_err_t                 err;
  527.     ngx_int_t                 rc, depth;
  528.     ngx_uint_t                overwrite, slash, dir, flags;
  529.     ngx_str_t                 path, uri, duri, args;
  530.     ngx_tree_ctx_t            tree;
  531.     ngx_copy_file_t           cf;
  532.     ngx_file_info_t           fi;
  533.     ngx_table_elt_t          *dest, *over;
  534.     ngx_ext_rename_file_t     ext;
  535.     ngx_http_dav_copy_ctx_t   copy;
  536.     ngx_http_dav_loc_conf_t  *dlcf;

  538.     if (r->headers_in.content_length_n > 0) {
  539.         return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
  540.     }

  542.     dest = r->headers_in.destination;

  544.     if (dest == NULL) {
  545.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  546.                       "client sent no \"Destination\" header");
  547.         return NGX_HTTP_BAD_REQUEST;
  548.     }

  550.     p = dest->value.data;
  551.     /* there is always '\0' even after empty header value */
  552.     if (p[0] == '/') {
  553.         last = p + dest->value.len;
  554.         goto destination_done;
  555.     }

  557.     len = r->headers_in.server.len;

  559.     if (len == 0) {
  560.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  561.                       "client sent no \"Host\" header");
  562.         return NGX_HTTP_BAD_REQUEST;
  563.     }

  565. #if (NGX_HTTP_SSL)

  567.     if (r->connection->ssl) {
  568.         if (ngx_strncmp(dest->value.data, "https://", sizeof("https://") - 1)
  569.             != 0)
  570.         {
  571.             goto invalid_destination;
  572.         }

  574.         host = dest->value.data + sizeof("https://") - 1;

  576.     } else
  577. #endif
  578.     {
  579.         if (ngx_strncmp(dest->value.data, "http://", sizeof("http://") - 1)
  580.             != 0)
  581.         {
  582.             goto invalid_destination;
  583.         }

  585.         host = dest->value.data + sizeof("http://") - 1;
  586.     }

  588.     if (ngx_strncmp(host, r->headers_in.server.data, len) != 0) {
  589.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  590.                       "\"Destination\" URI \"%V\" is handled by "
  591.                       "different repository than the source URI",
  592.                       &dest->value);
  593.         return NGX_HTTP_BAD_REQUEST;
  594.     }

  596.     last = dest->value.data + dest->value.len;

  598.     for (p = host + len; p < last; p++) {
  599.         if (*p == '/') {
  600.             goto destination_done;
  601.         }
  602.     }

  604. invalid_destination:

  606.     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  607.                   "client sent invalid \"Destination\" header: \"%V\"",
  608.                   &dest->value);
  609.     return NGX_HTTP_BAD_REQUEST;

  611. destination_done:

  613.     duri.len = last - p;
  614.     duri.data = p;
  615.     flags = NGX_HTTP_LOG_UNSAFE;

  617.     if (ngx_http_parse_unsafe_uri(r, &duri, &args, &flags) != NGX_OK) {
  618.         goto invalid_destination;
  619.     }

  621.     if ((r->uri.data[r->uri.len - 1] == '/' && *(last - 1) != '/')
  622.         || (r->uri.data[r->uri.len - 1] != '/' && *(last - 1) == '/'))
  623.     {
  624.          ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  625.                        "both URI \"%V\" and \"Destination\" URI \"%V\" "
  626.                        "should be either collections or non-collections",
  627.                        &r->uri, &dest->value);
  628.          return NGX_HTTP_CONFLICT;
  629.     }

  631.     depth = ngx_http_dav_depth(r, NGX_HTTP_DAV_INFINITY_DEPTH);

  633.     if (depth != NGX_HTTP_DAV_INFINITY_DEPTH) {

  635.         if (r->method == NGX_HTTP_COPY) {
  636.             if (depth != 0) {
  637.                 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  638.                               "\"Depth\" header must be 0 or infinity");
  639.                 return NGX_HTTP_BAD_REQUEST;
  640.             }

  642.         } else {
  643.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  644.                           "\"Depth\" header must be infinity");
  645.             return NGX_HTTP_BAD_REQUEST;
  646.         }
  647.     }

  649.     over = r->headers_in.overwrite;

  651.     if (over) {
  652.         if (over->value.len == 1) {
  653.             ch = over->value.data[0];

  655.             if (ch == 'T' || ch == 't') {
  656.                 overwrite = 1;
  657.                 goto overwrite_done;
  658.             }

  660.             if (ch == 'F' || ch == 'f') {
  661.                 overwrite = 0;
  662.                 goto overwrite_done;
  663.             }

  665.         }

  667.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  668.                       "client sent invalid \"Overwrite\" header: \"%V\"",
  669.                       &over->value);
  670.         return NGX_HTTP_BAD_REQUEST;
  671.     }

  673.     overwrite = 1;

  675. overwrite_done:

  677.     if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
  678.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  679.     }

  681.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
  682.                    "http copy from: \"%s\"", path.data);

  684.     uri = r->uri;
  685.     r->uri = duri;

  687.     if (ngx_http_map_uri_to_path(r, &copy.path, &root, 0) == NULL) {
  688.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  689.     }

  691.     r->uri = uri;

  693.     copy.path.len--;  /* omit "\0" */

  695.     if (copy.path.data[copy.path.len - 1] == '/') {
  696.         slash = 1;
  697.         copy.path.len--;
  698.         copy.path.data[copy.path.len] = '\0';

  700.     } else {
  701.         slash = 0;
  702.     }

  704.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
  705.                    "http copy to: \"%s\"", copy.path.data);

  707.     if (ngx_link_info(copy.path.data, &fi) == NGX_FILE_ERROR) {
  708.         err = ngx_errno;

  710.         if (err != NGX_ENOENT) {
  711.             return ngx_http_dav_error(r->connection->log, err,
  712.                                       NGX_HTTP_NOT_FOUND, ngx_link_info_n,
  713.                                       copy.path.data);
  714.         }

  716.         /* destination does not exist */

  718.         overwrite = 0;
  719.         dir = 0;

  721.     } else {

  723.         /* destination exists */

  725.         if (ngx_is_dir(&fi) && !slash) {
  726.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  727.                           "\"%V\" could not be %Ved to collection \"%V\"",
  728.                           &r->uri, &r->method_name, &dest->value);
  729.             return NGX_HTTP_CONFLICT;
  730.         }

  732.         if (!overwrite) {
  733.             ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_EEXIST,
  734.                           "\"%s\" could not be created", copy.path.data);
  735.             return NGX_HTTP_PRECONDITION_FAILED;
  736.         }

  738.         dir = ngx_is_dir(&fi);
  739.     }

  741.     if (ngx_link_info(path.data, &fi) == NGX_FILE_ERROR) {
  742.         return ngx_http_dav_error(r->connection->log, ngx_errno,
  743.                                   NGX_HTTP_NOT_FOUND, ngx_link_info_n,
  744.                                   path.data);
  745.     }

  747.     if (ngx_is_dir(&fi)) {

  749.         if (r->uri.data[r->uri.len - 1] != '/') {
  750.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  751.                           "\"%V\" is collection", &r->uri);
  752.             return NGX_HTTP_BAD_REQUEST;
  753.         }

  755.         if (overwrite) {
  756.             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
  757.                            "http delete: \"%s\"", copy.path.data);

  759.             rc = ngx_http_dav_delete_path(r, &copy.path, dir);

  761.             if (rc != NGX_OK) {
  762.                 return rc;
  763.             }
  764.         }
  765.     }

  767.     if (ngx_is_dir(&fi)) {

  769.         path.len -= 2;  /* omit "/\0" */

  771.         if (r->method == NGX_HTTP_MOVE) {
  772.             if (ngx_rename_file(path.data, copy.path.data) != NGX_FILE_ERROR) {
  773.                 return NGX_HTTP_CREATED;
  774.             }
  775.         }

  777.         if (ngx_create_dir(copy.path.data, ngx_file_access(&fi))
  778.             == NGX_FILE_ERROR)
  779.         {
  780.             return ngx_http_dav_error(r->connection->log, ngx_errno,
  781.                                       NGX_HTTP_NOT_FOUND,
  782.                                       ngx_create_dir_n, copy.path.data);
  783.         }

  785.         copy.len = path.len;

  787.         tree.init_handler = NULL;
  788.         tree.file_handler = ngx_http_dav_copy_tree_file;
  789.         tree.pre_tree_handler = ngx_http_dav_copy_dir;
  790.         tree.post_tree_handler = ngx_http_dav_copy_dir_time;
  791.         tree.spec_handler = ngx_http_dav_noop;
  792.         tree.data = &copy;
  793.         tree.alloc = 0;
  794.         tree.log = r->connection->log;

  796.         if (ngx_walk_tree(&tree, &path) == NGX_OK) {

  798.             if (r->method == NGX_HTTP_MOVE) {
  799.                 rc = ngx_http_dav_delete_path(r, &path, 1);

  801.                 if (rc != NGX_OK) {
  802.                     return rc;
  803.                 }
  804.             }

  806.             return NGX_HTTP_CREATED;
  807.         }

  809.     } else {

  811.         if (r->method == NGX_HTTP_MOVE) {

  813.             dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  815.             ext.access = 0;
  816.             ext.path_access = dlcf->access;
  817.             ext.time = -1;
  818.             ext.create_path = 1;
  819.             ext.delete_file = 0;
  820.             ext.log = r->connection->log;

  822.             if (ngx_ext_rename_file(&path, &copy.path, &ext) == NGX_OK) {
  823.                 return NGX_HTTP_NO_CONTENT;
  824.             }

  826.             return NGX_HTTP_INTERNAL_SERVER_ERROR;
  827.         }

  829.         dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  831.         cf.size = ngx_file_size(&fi);
  832.         cf.buf_size = 0;
  833.         cf.access = dlcf->access;
  834.         cf.time = ngx_file_mtime(&fi);
  835.         cf.log = r->connection->log;

  837.         if (ngx_copy_file(path.data, copy.path.data, &cf) == NGX_OK) {
  838.             return NGX_HTTP_NO_CONTENT;
  839.         }
  840.     }

  842.     return NGX_HTTP_INTERNAL_SERVER_ERROR;
  843. }


  846. static ngx_int_t
  847. ‌ngx_http_dav_copy_dir(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  848. {
  849.     u_char                   *p, *dir;
  850.     size_t                    len;
  851.     ngx_http_dav_copy_ctx_t  *copy;

  853.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  854.                    "http copy dir: \"%s\"", path->data);

  856.     copy = ctx->data;

  858.     len = copy->path.len + path->len;

  860.     dir = ngx_alloc(len + 1, ctx->log);
  861.     if (dir == NULL) {
  862.         return NGX_ABORT;
  863.     }

  865.     p = ngx_cpymem(dir, copy->path.data, copy->path.len);
  866.     (void) ngx_cpystrn(p, path->data + copy->len, path->len - copy->len + 1);

  868.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  869.                    "http copy dir to: \"%s\"", dir);

  871.     if (ngx_create_dir(dir, ngx_dir_access(ctx->access)) == NGX_FILE_ERROR) {
  872.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_create_dir_n,
  873.                                   dir);
  874.     }

  876.     ngx_free(dir);

  878.     return NGX_OK;
  879. }


  882. static ngx_int_t
  883. ‌ngx_http_dav_copy_dir_time(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  884. {
  885.     u_char                   *p, *dir;
  886.     size_t                    len;
  887.     ngx_http_dav_copy_ctx_t  *copy;

  889.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  890.                    "http copy dir time: \"%s\"", path->data);

  892.     copy = ctx->data;

  894.     len = copy->path.len + path->len;

  896.     dir = ngx_alloc(len + 1, ctx->log);
  897.     if (dir == NULL) {
  898.         return NGX_ABORT;
  899.     }

  901.     p = ngx_cpymem(dir, copy->path.data, copy->path.len);
  902.     (void) ngx_cpystrn(p, path->data + copy->len, path->len - copy->len + 1);

  904.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  905.                    "http copy dir time to: \"%s\"", dir);

  907. #if (NGX_WIN32)
  908.     {
  909.     ngx_fd_t  fd;

  911.     fd = ngx_open_file(dir, NGX_FILE_RDWR, NGX_FILE_OPEN, 0);

  913.     if (fd == NGX_INVALID_FILE) {
  914.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_open_file_n, dir);
  915.         goto failed;
  916.     }

  918.     if (ngx_set_file_time(NULL, fd, ctx->mtime) != NGX_OK) {
  919.         ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
  920.                       ngx_set_file_time_n " \"%s\" failed", dir);
  921.     }

  923.     if (ngx_close_file(fd) == NGX_FILE_ERROR) {
  924.         ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
  925.                       ngx_close_file_n " \"%s\" failed", dir);
  926.     }
  927.     }

  929. failed:

  931. #else

  933.     if (ngx_set_file_time(dir, 0, ctx->mtime) != NGX_OK) {
  934.         ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
  935.                       ngx_set_file_time_n " \"%s\" failed", dir);
  936.     }

  938. #endif

  940.     ngx_free(dir);

  942.     return NGX_OK;
  943. }


  946. static ngx_int_t
  947. ‌ngx_http_dav_copy_tree_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  948. {
  949.     u_char                   *p, *file;
  950.     size_t                    len;
  951.     ngx_copy_file_t           cf;
  952.     ngx_http_dav_copy_ctx_t  *copy;

  954.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  955.                    "http copy file: \"%s\"", path->data);

  957.     copy = ctx->data;

  959.     len = copy->path.len + path->len;

  961.     file = ngx_alloc(len + 1, ctx->log);
  962.     if (file == NULL) {
  963.         return NGX_ABORT;
  964.     }

  966.     p = ngx_cpymem(file, copy->path.data, copy->path.len);
  967.     (void) ngx_cpystrn(p, path->data + copy->len, path->len - copy->len + 1);

  969.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  970.                    "http copy file to: \"%s\"", file);

  972.     cf.size = ctx->size;
  973.     cf.buf_size = 0;
  974.     cf.access = ctx->access;
  975.     cf.time = ctx->mtime;
  976.     cf.log = ctx->log;

  978.     (void) ngx_copy_file(path->data, file, &cf);

  980.     ngx_free(file);

  982.     return NGX_OK;
  983. }


  986. static ngx_int_t
  987. ‌ngx_http_dav_depth(ngx_http_request_t *r, ngx_int_t dflt)
  988. {
  989.     ngx_table_elt_t  *depth;

  991.     depth = r->headers_in.depth;

  993.     if (depth == NULL) {
  994.         return dflt;
  995.     }

  997.     if (depth->value.len == 1) {

  999.         if (depth->value.data[0] == '0') {
  1000.             return 0;
  1001.         }

  1003.         if (depth->value.data[0] == '1') {
  1004.             return 1;
  1005.         }

  1007.     } else {

  1009.         if (depth->value.len == sizeof("infinity") - 1
  1010.             && ngx_strcmp(depth->value.data, "infinity") == 0)
  1011.         {
  1012.             return NGX_HTTP_DAV_INFINITY_DEPTH;
  1013.         }
  1014.     }

  1016.     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  1017.                   "client sent invalid \"Depth\" header: \"%V\"",
  1018.                   &depth->value);

  1020.     return NGX_HTTP_DAV_INVALID_DEPTH;
  1021. }


  1024. static ngx_int_t
  1025. ‌ngx_http_dav_error(ngx_log_t *log, ngx_err_t err, ngx_int_t not_found,
  1026.     char *failed, u_char *path)
  1027. {
  1028.     ngx_int_t   rc;
  1029.     ngx_uint_t  level;

  1031.     if (err == NGX_ENOENT || err == NGX_ENOTDIR || err == NGX_ENAMETOOLONG) {
  1032.         level = NGX_LOG_ERR;
  1033.         rc = not_found;

  1035.     } else if (err == NGX_EACCES || err == NGX_EPERM) {
  1036.         level = NGX_LOG_ERR;
  1037.         rc = NGX_HTTP_FORBIDDEN;

  1039.     } else if (err == NGX_EEXIST) {
  1040.         level = NGX_LOG_ERR;
  1041.         rc = NGX_HTTP_NOT_ALLOWED;

  1043.     } else if (err == NGX_ENOSPC) {
  1044.         level = NGX_LOG_CRIT;
  1045.         rc = NGX_HTTP_INSUFFICIENT_STORAGE;

  1047.     } else {
  1048.         level = NGX_LOG_CRIT;
  1049.         rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
  1050.     }

  1052.     ngx_log_error(level, log, err, "%s \"%s\" failed", failed, path);

  1054.     return rc;
  1055. }


  1058. static ngx_int_t
  1059. ‌ngx_http_dav_location(ngx_http_request_t *r, u_char *path)
  1060. {
  1061.     u_char                    *location;
  1062.     ngx_http_core_loc_conf_t  *clcf;

  1064.     r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t));
  1065.     if (r->headers_out.location == NULL) {
  1066.         return NGX_ERROR;
  1067.     }

  1069.     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);

  1071.     if (!clcf->alias && clcf->root_lengths == NULL) {
  1072.         location = path + clcf->root.len;

  1074.     } else {
  1075.         location = ngx_pnalloc(r->pool, r->uri.len);
  1076.         if (location == NULL) {
  1077.             return NGX_ERROR;
  1078.         }

  1080.         ngx_memcpy(location, r->uri.data, r->uri.len);
  1081.     }

  1083.     /*
  1084.      * we do not need to set the r->headers_out.location->hash and
  1085.      * r->headers_out.location->key fields
  1086.      */

  1088.     r->headers_out.location->value.len = r->uri.len;
  1089.     r->headers_out.location->value.data = location;

  1091.     return NGX_OK;
  1092. }


  1095. static void *
  1096. ‌ngx_http_dav_create_loc_conf(ngx_conf_t *cf)
  1097. {
  1098.     ngx_http_dav_loc_conf_t  *conf;

  1100.     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t));
  1101.     if (conf == NULL) {
  1102.         return NULL;
  1103.     }

  1105.     /*
  1106.      * set by ngx_pcalloc():
  1107.      *
  1108.      *     conf->methods = 0;
  1109.      */

  1111.     conf->min_delete_depth = NGX_CONF_UNSET_UINT;
  1112.     conf->access = NGX_CONF_UNSET_UINT;
  1113.     conf->create_full_put_path = NGX_CONF_UNSET;

  1115.     return conf;
  1116. }


  1119. static char *
  1120. ‌ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
  1121. {
  1122.     ngx_http_dav_loc_conf_t  *prev = parent;
  1123.     ngx_http_dav_loc_conf_t  *conf = child;

  1125.     ngx_conf_merge_bitmask_value(conf->methods, prev->methods,
  1126.                          (NGX_CONF_BITMASK_SET|NGX_HTTP_DAV_OFF));

  1128.     ngx_conf_merge_uint_value(conf->min_delete_depth,
  1129.                          prev->min_delete_depth, 0);

  1131.     ngx_conf_merge_uint_value(conf->access, prev->access, 0600);

  1133.     ngx_conf_merge_value(conf->create_full_put_path,
  1134.                          prev->create_full_put_path, 0);

  1136.     return NGX_CONF_OK;
  1137. }


  1140. static ngx_int_t
  1141. ‌ngx_http_dav_init(ngx_conf_t *cf)
  1142. {
  1143.     ngx_http_handler_pt        *h;
  1144.     ngx_http_core_main_conf_t  *cmcf;

  1146.     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);

  1148.     h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
  1149.     if (h == NULL) {
  1150.         return NGX_ERROR;
  1151.     }

  1153.     *h = ngx_http_dav_handler;

  1155.     return NGX_OK;
  1156. }

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