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src/http/modules/ngx_http_dav_module.c - nginx source code

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);
  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.         if (r->headers_in.content_range) {
  165.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  166.                           "PUT with range is unsupported");
  167.             return NGX_HTTP_NOT_IMPLEMENTED;
  168.         }

  170.         r->request_body_in_file_only = 1;
  171.         r->request_body_in_persistent_file = 1;
  172.         r->request_body_in_clean_file = 1;
  173.         r->request_body_file_group_access = 1;
  174.         r->request_body_file_log_level = 0;

  176.         rc = ngx_http_read_client_request_body(r, ngx_http_dav_put_handler);

  178.         if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
  179.             return rc;
  180.         }

  182.         return NGX_DONE;

  184.     case NGX_HTTP_DELETE:

  186.         return ngx_http_dav_delete_handler(r);

  188.     case NGX_HTTP_MKCOL:

  190.         return ngx_http_dav_mkcol_handler(r, dlcf);

  192.     case NGX_HTTP_COPY:

  194.         return ngx_http_dav_copy_move_handler(r);

  196.     case NGX_HTTP_MOVE:

  198.         return ngx_http_dav_copy_move_handler(r);
  199.     }

  201.     return NGX_DECLINED;
  202. }


  205. static void
  206. ‌ngx_http_dav_put_handler(ngx_http_request_t *r)
  207. {
  208.     size_t                    root;
  209.     time_t                    date;
  210.     ngx_str_t                *temp, path;
  211.     ngx_uint_t                status;
  212.     ngx_file_info_t           fi;
  213.     ngx_ext_rename_file_t     ext;
  214.     ngx_http_dav_loc_conf_t  *dlcf;

  216.     if (r->request_body == NULL) {
  217.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  218.                       "PUT request body is unavailable");
  219.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  220.         return;
  221.     }

  223.     if (r->request_body->temp_file == NULL) {
  224.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  225.                       "PUT request body must be in a file");
  226.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  227.         return;
  228.     }

  230.     if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
  231.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  232.         return;
  233.     }

  235.     path.len--;

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

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

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

  245.     } else {
  246.         status = NGX_HTTP_NO_CONTENT;

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

  252.             if (ngx_delete_file(temp->data) == NGX_FILE_ERROR) {
  253.                 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
  254.                               ngx_delete_file_n " \"%s\" failed",
  255.                               temp->data);
  256.             }

  258.             ngx_http_finalize_request(r, NGX_HTTP_CONFLICT);
  259.             return;
  260.         }
  261.     }

  263.     dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  265.     ext.access = dlcf->access;
  266.     ext.path_access = dlcf->access;
  267.     ext.time = -1;
  268.     ext.create_path = dlcf->create_full_put_path;
  269.     ext.delete_file = 1;
  270.     ext.log = r->connection->log;

  272.     if (r->headers_in.date) {
  273.         date = ngx_parse_http_time(r->headers_in.date->value.data,
  274.                                    r->headers_in.date->value.len);

  276.         if (date != NGX_ERROR) {
  277.             ext.time = date;
  278.             ext.fd = r->request_body->temp_file->file.fd;
  279.         }
  280.     }

  282.     if (ngx_ext_rename_file(temp, &path, &ext) != NGX_OK) {
  283.         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  284.         return;
  285.     }

  287.     if (status == NGX_HTTP_CREATED) {
  288.         if (ngx_http_dav_location(r) != NGX_OK) {
  289.             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
  290.             return;
  291.         }

  293.         r->headers_out.content_length_n = 0;
  294.     }

  296.     r->headers_out.status = status;
  297.     r->header_only = 1;

  299.     ngx_http_finalize_request(r, ngx_http_send_header(r));
  300.     return;
  301. }


  304. static ngx_int_t
  305. ‌ngx_http_dav_delete_handler(ngx_http_request_t *r)
  306. {
  307.     size_t                    root;
  308.     ngx_err_t                 err;
  309.     ngx_int_t                 rc, depth;
  310.     ngx_uint_t                i, d, dir;
  311.     ngx_str_t                 path;
  312.     ngx_file_info_t           fi;
  313.     ngx_http_dav_loc_conf_t  *dlcf;

  315.     if (r->headers_in.content_length_n > 0 || r->headers_in.chunked) {
  316.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  317.                       "DELETE with body is unsupported");
  318.         return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
  319.     }

  321.     dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  323.     if (dlcf->min_delete_depth) {
  324.         d = 0;

  326.         for (i = 0; i < r->uri.len; /* void */) {
  327.             if (r->uri.data[i++] == '/') {
  328.                 if (++d >= dlcf->min_delete_depth && i < r->uri.len) {
  329.                     goto ok;
  330.                 }
  331.             }
  332.         }

  334.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  335.                       "insufficient URI depth:%i to DELETE", d);
  336.         return NGX_HTTP_CONFLICT;
  337.     }

  339. ok:

  341.     if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
  342.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  343.     }

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

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

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

  353.         return ngx_http_dav_error(r->connection->log, err,
  354.                                   rc, ngx_link_info_n, path.data);
  355.     }

  357.     if (ngx_is_dir(&fi)) {

  359.         if (r->uri.data[r->uri.len - 1] != '/') {
  360.             ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_EISDIR,
  361.                           "DELETE \"%s\" failed", path.data);
  362.             return NGX_HTTP_CONFLICT;
  363.         }

  365.         depth = ngx_http_dav_depth(r, NGX_HTTP_DAV_INFINITY_DEPTH);

  367.         if (depth != NGX_HTTP_DAV_INFINITY_DEPTH) {
  368.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  369.                           "\"Depth\" header must be infinity");
  370.             return NGX_HTTP_BAD_REQUEST;
  371.         }

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

  375.         dir = 1;

  377.     } else {

  379.         /*
  380.          * we do not need to test (r->uri.data[r->uri.len - 1] == '/')
  381.          * because ngx_link_info("/file/") returned NGX_ENOTDIR above
  382.          */

  384.         depth = ngx_http_dav_depth(r, 0);

  386.         if (depth != 0 && depth != NGX_HTTP_DAV_INFINITY_DEPTH) {
  387.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  388.                           "\"Depth\" header must be 0 or infinity");
  389.             return NGX_HTTP_BAD_REQUEST;
  390.         }

  392.         dir = 0;
  393.     }

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

  397.     if (rc == NGX_OK) {
  398.         return NGX_HTTP_NO_CONTENT;
  399.     }

  401.     return rc;
  402. }


  405. static ngx_int_t
  406. ‌ngx_http_dav_delete_path(ngx_http_request_t *r, ngx_str_t *path, ngx_uint_t dir)
  407. {
  408.     char            *failed;
  409.     ngx_tree_ctx_t   tree;

  411.     if (dir) {

  413.         tree.init_handler = NULL;
  414.         tree.file_handler = ngx_http_dav_delete_file;
  415.         tree.pre_tree_handler = ngx_http_dav_noop;
  416.         tree.post_tree_handler = ngx_http_dav_delete_dir;
  417.         tree.spec_handler = ngx_http_dav_delete_file;
  418.         tree.data = NULL;
  419.         tree.alloc = 0;
  420.         tree.log = r->connection->log;

  422.         /* TODO: 207 */

  424.         if (ngx_walk_tree(&tree, path) != NGX_OK) {
  425.             return NGX_HTTP_INTERNAL_SERVER_ERROR;
  426.         }

  428.         if (ngx_delete_dir(path->data) != NGX_FILE_ERROR) {
  429.             return NGX_OK;
  430.         }

  432.         failed = ngx_delete_dir_n;

  434.     } else {

  436.         if (ngx_delete_file(path->data) != NGX_FILE_ERROR) {
  437.             return NGX_OK;
  438.         }

  440.         failed = ngx_delete_file_n;
  441.     }

  443.     return ngx_http_dav_error(r->connection->log, ngx_errno,
  444.                               NGX_HTTP_NOT_FOUND, failed, path->data);
  445. }


  448. static ngx_int_t
  449. ‌ngx_http_dav_delete_dir(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  450. {
  451.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  452.                    "http delete dir: \"%s\"", path->data);

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

  456.         /* TODO: add to 207 */

  458.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_delete_dir_n,
  459.                                   path->data);
  460.     }

  462.     return NGX_OK;
  463. }


  466. static ngx_int_t
  467. ‌ngx_http_dav_delete_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  468. {
  469.     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
  470.                    "http delete file: \"%s\"", path->data);

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

  474.         /* TODO: add to 207 */

  476.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_delete_file_n,
  477.                                   path->data);
  478.     }

  480.     return NGX_OK;
  481. }


  484. static ngx_int_t
  485. ‌ngx_http_dav_noop(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  486. {
  487.     return NGX_OK;
  488. }


  491. static ngx_int_t
  492. ‌ngx_http_dav_mkcol_handler(ngx_http_request_t *r, ngx_http_dav_loc_conf_t *dlcf)
  493. {
  494.     u_char    *p;
  495.     size_t     root;
  496.     ngx_str_t  path;

  498.     if (r->headers_in.content_length_n > 0 || r->headers_in.chunked) {
  499.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  500.                       "MKCOL with body is unsupported");
  501.         return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
  502.     }

  504.     if (r->uri.data[r->uri.len - 1] != '/') {
  505.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  506.                       "MKCOL can create a collection only");
  507.         return NGX_HTTP_CONFLICT;
  508.     }

  510.     p = ngx_http_map_uri_to_path(r, &path, &root, 0);
  511.     if (p == NULL) {
  512.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  513.     }

  515.     *(p - 1) = '\0';

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

  520.     if (ngx_create_dir(path.data, ngx_dir_access(dlcf->access))
  521.         != NGX_FILE_ERROR)
  522.     {
  523.         if (ngx_http_dav_location(r) != NGX_OK) {
  524.             return NGX_HTTP_INTERNAL_SERVER_ERROR;
  525.         }

  527.         return NGX_HTTP_CREATED;
  528.     }

  530.     return ngx_http_dav_error(r->connection->log, ngx_errno,
  531.                               NGX_HTTP_CONFLICT, ngx_create_dir_n, path.data);
  532. }


  535. static ngx_int_t
  536. ‌ngx_http_dav_copy_move_handler(ngx_http_request_t *r)
  537. {
  538.     u_char                   *p, *host, *last, ch;
  539.     size_t                    len, root;
  540.     ngx_err_t                 err;
  541.     ngx_int_t                 rc, depth;
  542.     ngx_uint_t                overwrite, slash, dir, flags;
  543.     ngx_str_t                 path, uri, duri, args;
  544.     ngx_tree_ctx_t            tree;
  545.     ngx_copy_file_t           cf;
  546.     ngx_file_info_t           fi;
  547.     ngx_table_elt_t          *dest, *over;
  548.     ngx_ext_rename_file_t     ext;
  549.     ngx_http_dav_copy_ctx_t   copy;
  550.     ngx_http_dav_loc_conf_t  *dlcf;

  552.     if (r->headers_in.content_length_n > 0 || r->headers_in.chunked) {
  553.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  554.                       "COPY and MOVE with body are unsupported");
  555.         return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
  556.     }

  558.     dest = r->headers_in.destination;

  560.     if (dest == NULL) {
  561.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  562.                       "client sent no \"Destination\" header");
  563.         return NGX_HTTP_BAD_REQUEST;
  564.     }

  566.     p = dest->value.data;
  567.     /* there is always '\0' even after empty header value */
  568.     if (p[0] == '/') {
  569.         last = p + dest->value.len;
  570.         goto destination_done;
  571.     }

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

  575.     if (len == 0) {
  576.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  577.                       "client sent no \"Host\" header");
  578.         return NGX_HTTP_BAD_REQUEST;
  579.     }

  581. #if (NGX_HTTP_SSL)

  583.     if (r->connection->ssl) {
  584.         if (ngx_strncmp(dest->value.data, "https://", sizeof("https://") - 1)
  585.             != 0)
  586.         {
  587.             goto invalid_destination;
  588.         }

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

  592.     } else
  593. #endif
  594.     {
  595.         if (ngx_strncmp(dest->value.data, "http://", sizeof("http://") - 1)
  596.             != 0)
  597.         {
  598.             goto invalid_destination;
  599.         }

  601.         host = dest->value.data + sizeof("http://") - 1;
  602.     }

  604.     if (ngx_strncmp(host, r->headers_in.server.data, len) != 0) {
  605.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  606.                       "\"Destination\" URI \"%V\" is handled by "
  607.                       "different repository than the source URI",
  608.                       &dest->value);
  609.         return NGX_HTTP_BAD_REQUEST;
  610.     }

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

  614.     for (p = host + len; p < last; p++) {
  615.         if (*p == '/') {
  616.             goto destination_done;
  617.         }
  618.     }

  620. invalid_destination:

  622.     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  623.                   "client sent invalid \"Destination\" header: \"%V\"",
  624.                   &dest->value);
  625.     return NGX_HTTP_BAD_REQUEST;

  627. destination_done:

  629.     duri.len = last - p;
  630.     duri.data = p;
  631.     flags = NGX_HTTP_LOG_UNSAFE;

  633.     if (ngx_http_parse_unsafe_uri(r, &duri, &args, &flags) != NGX_OK) {
  634.         goto invalid_destination;
  635.     }

  637.     if ((r->uri.data[r->uri.len - 1] == '/' && *(last - 1) != '/')
  638.         || (r->uri.data[r->uri.len - 1] != '/' && *(last - 1) == '/'))
  639.     {
  640.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  641.                       "both URI \"%V\" and \"Destination\" URI \"%V\" "
  642.                       "should be either collections or non-collections",
  643.                       &r->uri, &dest->value);
  644.         return NGX_HTTP_CONFLICT;
  645.     }

  647.     depth = ngx_http_dav_depth(r, NGX_HTTP_DAV_INFINITY_DEPTH);

  649.     if (depth != NGX_HTTP_DAV_INFINITY_DEPTH) {

  651.         if (r->method == NGX_HTTP_COPY) {
  652.             if (depth != 0) {
  653.                 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  654.                               "\"Depth\" header must be 0 or infinity");
  655.                 return NGX_HTTP_BAD_REQUEST;
  656.             }

  658.         } else {
  659.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  660.                           "\"Depth\" header must be infinity");
  661.             return NGX_HTTP_BAD_REQUEST;
  662.         }
  663.     }

  665.     over = r->headers_in.overwrite;

  667.     if (over) {
  668.         if (over->value.len == 1) {
  669.             ch = over->value.data[0];

  671.             if (ch == 'T' || ch == 't') {
  672.                 overwrite = 1;
  673.                 goto overwrite_done;
  674.             }

  676.             if (ch == 'F' || ch == 'f') {
  677.                 overwrite = 0;
  678.                 goto overwrite_done;
  679.             }

  681.         }

  683.         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  684.                       "client sent invalid \"Overwrite\" header: \"%V\"",
  685.                       &over->value);
  686.         return NGX_HTTP_BAD_REQUEST;
  687.     }

  689.     overwrite = 1;

  691. overwrite_done:

  693.     if (ngx_http_map_uri_to_path(r, &path, &root, 0) == NULL) {
  694.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  695.     }

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

  700.     uri = r->uri;
  701.     r->uri = duri;

  703.     if (ngx_http_map_uri_to_path(r, &copy.path, &root, 0) == NULL) {
  704.         return NGX_HTTP_INTERNAL_SERVER_ERROR;
  705.     }

  707.     r->uri = uri;

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

  711.     if (copy.path.data[copy.path.len - 1] == '/') {
  712.         slash = 1;
  713.         copy.path.len--;
  714.         copy.path.data[copy.path.len] = '\0';

  716.     } else {
  717.         slash = 0;
  718.     }

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

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

  726.         if (err != NGX_ENOENT) {
  727.             return ngx_http_dav_error(r->connection->log, err,
  728.                                       NGX_HTTP_NOT_FOUND, ngx_link_info_n,
  729.                                       copy.path.data);
  730.         }

  732.         /* destination does not exist */

  734.         overwrite = 0;
  735.         dir = 0;

  737.     } else {

  739.         /* destination exists */

  741.         if (ngx_is_dir(&fi) && !slash) {
  742.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  743.                           "\"%V\" could not be %Ved to collection \"%V\"",
  744.                           &r->uri, &r->method_name, &dest->value);
  745.             return NGX_HTTP_CONFLICT;
  746.         }

  748.         if (!overwrite) {
  749.             ngx_log_error(NGX_LOG_ERR, r->connection->log, NGX_EEXIST,
  750.                           "\"%s\" could not be created", copy.path.data);
  751.             return NGX_HTTP_PRECONDITION_FAILED;
  752.         }

  754.         dir = ngx_is_dir(&fi);
  755.     }

  757.     if (ngx_link_info(path.data, &fi) == NGX_FILE_ERROR) {
  758.         return ngx_http_dav_error(r->connection->log, ngx_errno,
  759.                                   NGX_HTTP_NOT_FOUND, ngx_link_info_n,
  760.                                   path.data);
  761.     }

  763.     if (ngx_is_dir(&fi)) {

  765.         if (r->uri.data[r->uri.len - 1] != '/') {
  766.             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  767.                           "\"%V\" is collection", &r->uri);
  768.             return NGX_HTTP_BAD_REQUEST;
  769.         }

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

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

  777.             if (rc != NGX_OK) {
  778.                 return rc;
  779.             }
  780.         }
  781.     }

  783.     if (ngx_is_dir(&fi)) {

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

  787.         if (r->method == NGX_HTTP_MOVE) {
  788.             if (ngx_rename_file(path.data, copy.path.data) != NGX_FILE_ERROR) {
  789.                 return NGX_HTTP_CREATED;
  790.             }
  791.         }

  793.         if (ngx_create_dir(copy.path.data, ngx_file_access(&fi))
  794.             == NGX_FILE_ERROR)
  795.         {
  796.             return ngx_http_dav_error(r->connection->log, ngx_errno,
  797.                                       NGX_HTTP_NOT_FOUND,
  798.                                       ngx_create_dir_n, copy.path.data);
  799.         }

  801.         copy.len = path.len;

  803.         tree.init_handler = NULL;
  804.         tree.file_handler = ngx_http_dav_copy_tree_file;
  805.         tree.pre_tree_handler = ngx_http_dav_copy_dir;
  806.         tree.post_tree_handler = ngx_http_dav_copy_dir_time;
  807.         tree.spec_handler = ngx_http_dav_noop;
  808.         tree.data = &copy;
  809.         tree.alloc = 0;
  810.         tree.log = r->connection->log;

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

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

  817.                 if (rc != NGX_OK) {
  818.                     return rc;
  819.                 }
  820.             }

  822.             return NGX_HTTP_CREATED;
  823.         }

  825.     } else {

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

  829.             dlcf = ngx_http_get_module_loc_conf(r, ngx_http_dav_module);

  831.             ext.access = 0;
  832.             ext.path_access = dlcf->access;
  833.             ext.time = -1;
  834.             ext.create_path = 1;
  835.             ext.delete_file = 0;
  836.             ext.log = r->connection->log;

  838.             if (ngx_ext_rename_file(&path, &copy.path, &ext) == NGX_OK) {
  839.                 return NGX_HTTP_NO_CONTENT;
  840.             }

  842.             return NGX_HTTP_INTERNAL_SERVER_ERROR;
  843.         }

  845.         cf.size = ngx_file_size(&fi);
  846.         cf.buf_size = 0;
  847.         cf.access = ngx_file_access(&fi);
  848.         cf.time = ngx_file_mtime(&fi);
  849.         cf.log = r->connection->log;

  851.         if (ngx_copy_file(path.data, copy.path.data, &cf) == NGX_OK) {
  852.             return NGX_HTTP_NO_CONTENT;
  853.         }
  854.     }

  856.     return NGX_HTTP_INTERNAL_SERVER_ERROR;
  857. }


  860. static ngx_int_t
  861. ‌ngx_http_dav_copy_dir(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  862. {
  863.     u_char                   *p, *dir;
  864.     size_t                    len;
  865.     ngx_http_dav_copy_ctx_t  *copy;

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

  870.     copy = ctx->data;

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

  874.     dir = ngx_alloc(len + 1, ctx->log);
  875.     if (dir == NULL) {
  876.         return NGX_ABORT;
  877.     }

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

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

  885.     if (ngx_create_dir(dir, ngx_dir_access(ctx->access)) == NGX_FILE_ERROR) {
  886.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_create_dir_n,
  887.                                   dir);
  888.     }

  890.     ngx_free(dir);

  892.     return NGX_OK;
  893. }


  896. static ngx_int_t
  897. ‌ngx_http_dav_copy_dir_time(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  898. {
  899.     u_char                   *p, *dir;
  900.     size_t                    len;
  901.     ngx_http_dav_copy_ctx_t  *copy;

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

  906.     copy = ctx->data;

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

  910.     dir = ngx_alloc(len + 1, ctx->log);
  911.     if (dir == NULL) {
  912.         return NGX_ABORT;
  913.     }

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

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

  921. #if (NGX_WIN32)
  922.     {
  923.     ngx_fd_t  fd;

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

  927.     if (fd == NGX_INVALID_FILE) {
  928.         (void) ngx_http_dav_error(ctx->log, ngx_errno, 0, ngx_open_file_n, dir);
  929.         goto failed;
  930.     }

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

  937.     if (ngx_close_file(fd) == NGX_FILE_ERROR) {
  938.         ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
  939.                       ngx_close_file_n " \"%s\" failed", dir);
  940.     }
  941.     }

  943. failed:

  945. #else

  947.     if (ngx_set_file_time(dir, 0, ctx->mtime) != NGX_OK) {
  948.         ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
  949.                       ngx_set_file_time_n " \"%s\" failed", dir);
  950.     }

  952. #endif

  954.     ngx_free(dir);

  956.     return NGX_OK;
  957. }


  960. static ngx_int_t
  961. ‌ngx_http_dav_copy_tree_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
  962. {
  963.     u_char                   *p, *file;
  964.     size_t                    len;
  965.     ngx_copy_file_t           cf;
  966.     ngx_http_dav_copy_ctx_t  *copy;

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

  971.     copy = ctx->data;

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

  975.     file = ngx_alloc(len + 1, ctx->log);
  976.     if (file == NULL) {
  977.         return NGX_ABORT;
  978.     }

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

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

  986.     cf.size = ctx->size;
  987.     cf.buf_size = 0;
  988.     cf.access = ctx->access;
  989.     cf.time = ctx->mtime;
  990.     cf.log = ctx->log;

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

  994.     ngx_free(file);

  996.     return NGX_OK;
  997. }


  1000. static ngx_int_t
  1001. ‌ngx_http_dav_depth(ngx_http_request_t *r, ngx_int_t dflt)
  1002. {
  1003.     ngx_table_elt_t  *depth;

  1005.     depth = r->headers_in.depth;

  1007.     if (depth == NULL) {
  1008.         return dflt;
  1009.     }

  1011.     if (depth->value.len == 1) {

  1013.         if (depth->value.data[0] == '0') {
  1014.             return 0;
  1015.         }

  1017.         if (depth->value.data[0] == '1') {
  1018.             return 1;
  1019.         }

  1021.     } else {

  1023.         if (depth->value.len == sizeof("infinity") - 1
  1024.             && ngx_strcmp(depth->value.data, "infinity") == 0)
  1025.         {
  1026.             return NGX_HTTP_DAV_INFINITY_DEPTH;
  1027.         }
  1028.     }

  1030.     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
  1031.                   "client sent invalid \"Depth\" header: \"%V\"",
  1032.                   &depth->value);

  1034.     return NGX_HTTP_DAV_INVALID_DEPTH;
  1035. }


  1038. static ngx_int_t
  1039. ‌ngx_http_dav_error(ngx_log_t *log, ngx_err_t err, ngx_int_t not_found,
  1040.     char *failed, u_char *path)
  1041. {
  1042.     ngx_int_t   rc;
  1043.     ngx_uint_t  level;

  1045.     if (err == NGX_ENOENT || err == NGX_ENOTDIR || err == NGX_ENAMETOOLONG) {
  1046.         level = NGX_LOG_ERR;
  1047.         rc = not_found;

  1049.     } else if (err == NGX_EACCES || err == NGX_EPERM) {
  1050.         level = NGX_LOG_ERR;
  1051.         rc = NGX_HTTP_FORBIDDEN;

  1053.     } else if (err == NGX_EEXIST) {
  1054.         level = NGX_LOG_ERR;
  1055.         rc = NGX_HTTP_NOT_ALLOWED;

  1057.     } else if (err == NGX_ENOSPC) {
  1058.         level = NGX_LOG_CRIT;
  1059.         rc = NGX_HTTP_INSUFFICIENT_STORAGE;

  1061.     } else {
  1062.         level = NGX_LOG_CRIT;
  1063.         rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
  1064.     }

  1066.     ngx_log_error(level, log, err, "%s \"%s\" failed", failed, path);

  1068.     return rc;
  1069. }


  1072. static ngx_int_t
  1073. ‌ngx_http_dav_location(ngx_http_request_t *r)
  1074. {
  1075.     u_char     *p;
  1076.     size_t      len;
  1077.     uintptr_t   escape;

  1079.     r->headers_out.location = ngx_list_push(&r->headers_out.headers);
  1080.     if (r->headers_out.location == NULL) {
  1081.         return NGX_ERROR;
  1082.     }

  1084.     r->headers_out.location->hash = 1;
  1085.     r->headers_out.location->next = NULL;
  1086.     ngx_str_set(&r->headers_out.location->key, "Location");

  1088.     escape = 2 * ngx_escape_uri(NULL, r->uri.data, r->uri.len, NGX_ESCAPE_URI);

  1090.     if (escape) {
  1091.         len = r->uri.len + escape;

  1093.         p = ngx_pnalloc(r->pool, len);
  1094.         if (p == NULL) {
  1095.             ngx_http_clear_location(r);
  1096.             return NGX_ERROR;
  1097.         }

  1099.         r->headers_out.location->value.len = len;
  1100.         r->headers_out.location->value.data = p;

  1102.         ngx_escape_uri(p, r->uri.data, r->uri.len, NGX_ESCAPE_URI);

  1104.     } else {
  1105.         r->headers_out.location->value = r->uri;
  1106.     }

  1108.     return NGX_OK;
  1109. }


  1112. static void *
  1113. ‌ngx_http_dav_create_loc_conf(ngx_conf_t *cf)
  1114. {
  1115.     ngx_http_dav_loc_conf_t  *conf;

  1117.     conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_dav_loc_conf_t));
  1118.     if (conf == NULL) {
  1119.         return NULL;
  1120.     }

  1122.     /*
  1123.      * set by ngx_pcalloc():
  1124.      *
  1125.      *     conf->methods = 0;
  1126.      */

  1128.     conf->min_delete_depth = NGX_CONF_UNSET_UINT;
  1129.     conf->access = NGX_CONF_UNSET_UINT;
  1130.     conf->create_full_put_path = NGX_CONF_UNSET;

  1132.     return conf;
  1133. }


  1136. static char *
  1137. ‌ngx_http_dav_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
  1138. {
  1139.     ngx_http_dav_loc_conf_t  *prev = parent;
  1140.     ngx_http_dav_loc_conf_t  *conf = child;

  1142.     ngx_conf_merge_bitmask_value(conf->methods, prev->methods,
  1143.                          (NGX_CONF_BITMASK_SET|NGX_HTTP_DAV_OFF));

  1145.     ngx_conf_merge_uint_value(conf->min_delete_depth,
  1146.                          prev->min_delete_depth, 0);

  1148.     ngx_conf_merge_uint_value(conf->access, prev->access, 0600);

  1150.     ngx_conf_merge_value(conf->create_full_put_path,
  1151.                          prev->create_full_put_path, 0);

  1153.     return NGX_CONF_OK;
  1154. }


  1157. static ngx_int_t
  1158. ‌ngx_http_dav_init(ngx_conf_t *cf)
  1159. {
  1160.     ngx_http_handler_pt        *h;
  1161.     ngx_http_core_main_conf_t  *cmcf;

  1163.     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);

  1165.     h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
  1166.     if (h == NULL) {
  1167.         return NGX_ERROR;
  1168.     }

  1170.     *h = ngx_http_dav_handler;

  1172.     return NGX_OK;
  1173. }

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