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joplin/ReactNativeClient/lib/file-api-driver-webdav.js

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const BaseItem = require('lib/models/BaseItem.js');
const { time } = require('lib/time-utils.js');
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const { basicDelta } = require('lib/file-api');
const { rtrimSlashes, ltrimSlashes } = require('lib/path-utils.js');
const Entities = require('html-entities').AllHtmlEntities;
const html_entity_decode = (new Entities()).decode;
const { shim } = require('lib/shim');
const { basename } = require('lib/path-utils');
const JoplinError = require('lib/JoplinError');
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class FileApiDriverWebDav {
constructor(api) {
this.api_ = api;
}
api() {
return this.api_;
}
requestRepeatCount() {
return 3;
}
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async stat(path) {
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try {
const result = await this.api().execPropFind(path, 0, [
'd:getlastmodified',
'd:resourcetype',
]);
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const resource = this.api().objectFromJson(result, ['d:multistatus', 'd:response', 0]);
return this.statFromResource_(resource, path);
} catch (error) {
if (error.code === 404) return null;
throw error;
}
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}
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statFromResource_(resource, path) {
// WebDAV implementations are always slightly different from one server to another but, at the minimum,
// a resource should have a propstat key - if not it's probably an error.
const propStat = this.api().arrayFromJson(resource, ['d:propstat']);
if (!Array.isArray(propStat)) throw new Error('Invalid WebDAV resource format: ' + JSON.stringify(resource));
// Disabled for now to try to fix this: https://github.com/laurent22/joplin/issues/624
//
// const httpStatusLine = this.api().stringFromJson(resource, ['d:propstat',0,'d:status', 0]);
// if ( typeof httpStatusLine === 'string' && httpStatusLine.indexOf('404') >= 0 ) throw new JoplinError(resource, 404);
const resourceTypes = this.api().resourcePropByName(resource, 'array', 'd:resourcetype');
let isDir = false;
if (Array.isArray(resourceTypes)) {
for (let i = 0; i < resourceTypes.length; i++) {
const t = resourceTypes[i];
if (typeof t === 'object' && 'd:collection' in t) {
isDir = true;
break;
}
}
}
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const lastModifiedString = this.api().resourcePropByName(resource, 'string', 'd:getlastmodified');
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// Note: Not all WebDAV servers return a getlastmodified date (eg. Seafile, which doesn't return the
// property for folders) so we can only throw an error if it's a file.
if (!lastModifiedString && !isDir) throw new Error('Could not get lastModified date for resource: ' + JSON.stringify(resource));
const lastModifiedDate = lastModifiedString ? new Date(lastModifiedString) : new Date();
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if (isNaN(lastModifiedDate.getTime())) throw new Error('Invalid date: ' + lastModifiedString);
return {
path: path,
updated_time: lastModifiedDate.getTime(),
isDir: isDir,
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};
}
async setTimestamp(path, timestampMs) {
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throw new Error('Not implemented'); // Not needed anymore
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}
async delta(path, options) {
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const getDirStats = async (path) => {
const result = await this.list(path);
return result.items;
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};
return await basicDelta(path, getDirStats, options);
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}
// A file href, as found in the result of a PROPFIND, can be either an absolute URL or a
// relative URL (an absolute URL minus the protocol and domain), while the sync algorithm
// works with paths relative to the base URL.
hrefToRelativePath_(href, baseUrl, relativeBaseUrl) {
let output = '';
if (href.indexOf(baseUrl) === 0) {
output = href.substr(baseUrl.length);
} else if (href.indexOf(relativeBaseUrl) === 0) {
output = href.substr(relativeBaseUrl.length);
} else {
throw new Error('href ' + href + ' not in baseUrl ' + baseUrl + ' nor relativeBaseUrl ' + relativeBaseUrl);
}
return rtrimSlashes(ltrimSlashes(output));
}
statsFromResources_(resources) {
const relativeBaseUrl = this.api().relativeBaseUrl();
const baseUrl = this.api().baseUrl();
let output = [];
for (let i = 0; i < resources.length; i++) {
const resource = resources[i];
const href = this.api().stringFromJson(resource, ['d:href', 0]);
const path = this.hrefToRelativePath_(href, baseUrl, relativeBaseUrl);
// if (href.indexOf(relativeBaseUrl) !== 0) throw new Error('Path "' + href + '" not inside base URL: ' + relativeBaseUrl);
// const path = rtrimSlashes(ltrimSlashes(href.substr(relativeBaseUrl.length)));
if (path === '') continue; // The list of resources includes the root dir too, which we don't want
const stat = this.statFromResource_(resources[i], path);
output.push(stat);
}
return output;
}
async list(path, options) {
// const relativeBaseUrl = this.api().relativeBaseUrl();
// function parsePropFindXml(xmlString) {
// return new Promise(async (resolve, reject) => {
// const saxOptions = {};
// const saxParser = require('sax').parser(false, { position: false });
// let stats = [];
// let currentStat = null;
// let currentText = '';
// // When this is on, the tags from the bloated XML string are replaced by shorter ones,
// // which makes parsing about 25% faster. However it's a bit of a hack so keep it as
// // an option so that it can be disabled if it causes problems.
// const optimizeXml = true;
// const tagResponse = optimizeXml ? 'd:r' : 'd:response';
// const tagGetLastModified = optimizeXml ? 'd:glm' : 'd:getlastmodified';
// const tagPropStat = optimizeXml ? 'd:ps' : 'd:propstat';
// const replaceUrls = optimizeXml;
// saxParser.onerror = function (error) {
// reject(new Error(e.toString()));
// };
// saxParser.ontext = function (t) {
// currentText += t;
// };
// saxParser.onopentag = function (node) {
// const tagName = node.name.toLowerCase();
// currentText = '';
// if (tagName === tagResponse) {
// currentStat = { isDir: false };
// }
// };
// saxParser.onclosetag = function(tagName) {
// tagName = tagName.toLowerCase();
// if (tagName === tagResponse) {
// if (currentStat.path) { // The list of resources includes the root dir too, which we don't want
// if (!currentStat.updated_time) throw new Error('Resource does not have a getlastmodified prop');
// stats.push(currentStat);
// }
// currentStat = null;
// }
// if (tagName === 'd:href') {
// const href = currentText;
// if (replaceUrls) {
// currentStat.path = rtrimSlashes(ltrimSlashes(href));
// } else {
// if (href.indexOf(relativeBaseUrl) < 0) throw new Error('Path not inside base URL: ' + relativeBaseUrl); // Normally not possible
// currentStat.path = rtrimSlashes(ltrimSlashes(href.substr(relativeBaseUrl.length)));
// }
// }
// if (tagName === tagGetLastModified) {
// const lastModifiedDate = new Date(currentText);
// if (isNaN(lastModifiedDate.getTime())) throw new Error('Invalid date: ' + currentText);
// currentStat.updated_time = lastModifiedDate.getTime();
// currentStat.created_time = currentStat.updated_time;
// }
// if (tagName === 'd:collection') {
// currentStat.isDir = true;
// }
// currentText = '';
// }
// saxParser.onend = function () {
// resolve(stats);
// };
// if (optimizeXml) {
// xmlString = xmlString.replace(/<d:status>HTTP\/1\.1 200 OK<\/d:status>/ig, '');
// xmlString = xmlString.replace(/<d:resourcetype\/>/ig, '');
// xmlString = xmlString.replace(/d:getlastmodified/ig, tagGetLastModified);
// xmlString = xmlString.replace(/d:response/ig, tagResponse);
// xmlString = xmlString.replace(/d:propstat/ig, tagPropStat);
// if (replaceUrls) xmlString = xmlString.replace(new RegExp(relativeBaseUrl, 'gi'), '');
// }
// let idx = 0;
// let size = 1024 * 100;
// while (true) {
// sub = xmlString.substr(idx, size);
// if (!sub.length) break;
// saxParser.write(sub);
// idx += size;
// //await time.msleep(500);
// }
// saxParser.close();
// //saxParser.write(xmlString).close();
// });
// }
// For performance reasons, the response of the PROPFIND call is manually parsed with a regex below
// instead of being processed by xml2json like the other WebDAV responses. This is over 2 times faster
// and it means the mobile app does not freeze during sync.
// async function parsePropFindXml2(xmlString) {
// const regex = /<d:response>[\S\s]*?<d:href>([\S\s]*?)<\/d:href>[\S\s]*?<d:getlastmodified>(.*?)<\/d:getlastmodified>/g;
// let output = [];
// let match = null;
// while (match = regex.exec(xmlString)) {
// const href = html_entity_decode(match[1]);
// if (href.indexOf(relativeBaseUrl) < 0) throw new Error('Path not inside base URL: ' + relativeBaseUrl); // Normally not possible
// const path = rtrimSlashes(ltrimSlashes(href.substr(relativeBaseUrl.length)));
// if (!path) continue; // The list of resources includes the root dir too, which we don't want
// const lastModifiedDate = new Date(match[2]);
// if (isNaN(lastModifiedDate.getTime())) throw new Error('Invalid date: ' + match[2]);
// output.push({
// path: path,
// updated_time: lastModifiedDate.getTime(),
// created_time: lastModifiedDate.getTime(),
// isDir: !BaseItem.isSystemPath(path),
// });
// }
// return output;
// }
// const resultXml = await this.api().execPropFind(path, 1, [
// 'd:getlastmodified',
// //'d:resourcetype', // Include this to use parsePropFindXml()
// ], { responseFormat: 'text' });
// const stats = await parsePropFindXml2(resultXml);
// return {
// items: stats,
// hasMore: false,
// context: null,
// };
const result = await this.api().execPropFind(path, 1, [
'd:getlastmodified',
'd:resourcetype',
]);
const resources = this.api().arrayFromJson(result, ['d:multistatus', 'd:response']);
const stats = this.statsFromResources_(resources);
return {
items: stats,
hasMore: false,
context: null,
};
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}
async get(path, options) {
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if (!options) options = {};
if (!options.responseFormat) options.responseFormat = 'text';
try {
const response = await this.api().exec('GET', path, null, null, options);
// This is awful but instead of a 404 Not Found, Microsoft IIS returns an HTTP code 200
// with a response body "The specified file doesn't exist." for non-existing files,
// so we need to check for this.
if (response === "The specified file doesn't exist.") throw new JoplinError(response, 404);
return response;
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} catch (error) {
if (error.code !== 404) throw error;
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return null;
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}
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}
async mkdir(path) {
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try {
// RFC wants this, and so does NGINX. Not having the trailing slash means that some
// WebDAV implementations will redirect to a URL with "/". However, when doing so
// in React Native, the auth headers, etc. are lost so we need to avoid this.
// https://github.com/facebook/react-native/issues/929
if (!path.endsWith('/')) path = path + '/';
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await this.api().exec('MKCOL', path);
} catch (error) {
if (error.code === 405) return; // 405 means that the collection already exists (Method Not Allowed)
// 409 should only be returned if a parent path does not exists (eg. when trying to create a/b/c when a/b does not exist)
// however non-compliant servers (eg. Microsoft IIS) also return this code when the directory already exists. So here, if
// we get this code, verify that indeed the directory already exists and exit if it does.
if (error.code === 409) {
const stat = await this.stat(path);
if (stat) return;
}
throw error;
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}
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}
async put(path, content, options = null) {
return await this.api().exec('PUT', path, content, null, options);
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}
async delete(path) {
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try {
await this.api().exec('DELETE', path);
} catch (error) {
if (error.code !== 404) throw error;
}
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}
async move(oldPath, newPath) {
await this.api().exec('MOVE', oldPath, null, {
'Destination': this.api().baseUrl() + '/' + newPath,
'Overwrite': 'T',
});
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}
format() {
throw new Error('Not supported');
}
async clearRoot() {
await this.delete('');
await this.mkdir('');
}
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}
module.exports = { FileApiDriverWebDav };