src/server/plugins/postgresql/vfs.h

Sun, 08 May 2022 19:29:27 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 08 May 2022 19:29:27 +0200
branch
webdav
changeset 346
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parent 345
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child 366
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permissions
-rw-r--r--

extend postgresql vfs to store an etag in the file

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2022 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #ifndef WS_PG_VFS_H
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30 #define WS_PG_VFS_H
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31
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32 #include "../../public/nsapi.h"
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33 #include "../../public/vfs.h"
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34
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35 #include <libpq-fe.h>
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36 #include <libpq/libpq-fs.h>
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37
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38 #ifdef __cplusplus
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39 extern "C" {
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40 #endif
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41
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42 #define PG_ETAG_MAXLEN 48
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43
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44 typedef struct PgVFS {
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45 ResourceData *pg_resource;
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46 PGconn *connection;
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47 } PgVFS;
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49 typedef struct PgFile {
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50 int64_t resource_id;
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51 int64_t parent_id;
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52 WSBool iscollection;
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53 Oid oid;
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54 int fd;
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55 int oflags;
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56 char etag[PG_ETAG_MAXLEN];
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57 struct stat s;
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58 } PgFile;
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59
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60 typedef struct PgDir {
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61 VFSFile *file;
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62 PGresult *result;
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63 int row;
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64 int nrows;
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65 } PgDir;
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66
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67 VFS* pg_vfs_create(Session *sn, Request *rq, pblock *pb);
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68
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69 VFS* pg_vfs_create_from_resourcedata(Session *sn, Request *rq, ResourceData *resdata);
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72 /*
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73 * Resolve a path into a parent_id and resource name
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74 *
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75 * Only absolute paths are supported, therefore path[0] must be '/'
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76 *
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77 * If the resource is not found, res_errno is set to ENOENT
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78 */
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79 int pg_resolve_path(
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80 PGconn *connection,
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81 const char *path,
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82 int64_t *parent_id,
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83 int64_t *resource_id,
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84 Oid *oid,
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85 const char **resource_name,
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86 WSBool *iscollection,
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87 struct stat *s,
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88 char *etag,
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89 int *res_errno);
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91 void pg_set_stat(
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92 struct stat *s,
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93 const char *iscollection,
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94 const char *lastmodified,
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95 const char *creationdate,
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96 const char *contentlength);
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98 int pg_create_file(
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99 VFSContext *ctx,
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100 PgVFS *pg,
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101 const char *path,
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102 int64_t *new_resource_id,
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103 int64_t *res_parent_id,
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104 Oid *oid,
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105 const char **resource_name,
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106 struct stat *s,
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107 WSBool collection);
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108
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109 int pg_remove_res(
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110 VFSContext *ctx,
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111 PgVFS *pg,
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112 int64_t resource_id,
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113 Oid oid);
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114
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115 int pg_update_resource(PgVFS *pg, int64_t resource_id, int64_t contentlength);
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117 SYS_FILE pg_vfs_open(VFSContext *ctx, const char *path, int oflags);
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118 int pg_vfs_stat(VFSContext *ctx, const char *path, struct stat *buf);
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119 int pg_vfs_fstat(VFSContext *ctx, SYS_FILE fd, struct stat *buf);
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120 VFS_DIR pg_vfs_opendir(VFSContext *ctx, const char *path);
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121 VFS_DIR pg_vfs_fdopendir(VFSContext *ctx, SYS_FILE fd);
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122 int pg_vfs_mkdir(VFSContext *ctx, const char *path);
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123 int pg_vfs_unlink(VFSContext *ctx, const char *path);
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124 int pg_vfs_rmdir(VFSContext *ctx, const char *path);
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127 ssize_t pg_vfs_io_read(SYS_FILE fd, void *buf, size_t nbyte);
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128 ssize_t pg_vfs_io_write(SYS_FILE fd, const void *buf, size_t nbyte);
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129 ssize_t pg_vfs_io_pread(SYS_FILE fd, void *buf, size_t nbyte, off_t offset);
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130 ssize_t pg_vfs_io_pwrite(SYS_FILE fd, const void *buf, size_t nbyte, off_t offset);
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131 off_t pg_vfs_io_seek(SYS_FILE fd, off_t offset, int whence);
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132 off_t pg_vfs_io_tell(SYS_FILE fd);
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133 void pg_vfs_io_close(SYS_FILE fd);
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134 const char *pg_vfs_io_getetag(SYS_FILE fd);
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137 int pg_vfs_dirio_readdir(VFS_DIR dir, VFS_ENTRY *entry, int getstat);
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138 void pg_vfs_dirio_close(VFS_DIR dir);
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139
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140 time_t pg_convert_timestamp(const char *timestamp);
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141 int pg_convert_timestamp_tm(const char *timestamp, struct tm *tm);
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142
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143 #ifdef __cplusplus
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144 }
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145 #endif
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146
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147 #endif /* WS_PG_VFS_H */
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148

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