added regex url parsing
This commit is contained in:
bill bittner
parent
4f8cdc06b0
commit
87d026b5ec
1 changed files with 124 additions and 61 deletions
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@ -7,7 +7,6 @@ const db = require('../models');
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const SERVE = 'SERVE';
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const SHOW = 'SHOW';
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const SHOWLITE = 'SHOWLITE';
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const CLAIM_ID_CHAR = ':';
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const CHANNEL_CHAR = '@';
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const CLAIMS_PER_PAGE = 10;
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const NO_CHANNEL = 'NO_CHANNEL';
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@ -26,24 +25,6 @@ function isValidShortIdOrClaimId (input) {
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return (isValidClaimId(input) || isValidShortId(input));
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}
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function isUriAChannel (name) {
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return (name.charAt(0) === CHANNEL_CHAR);
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}
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function returnChannelNameFromUri (uri) {
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if (uri.indexOf(CLAIM_ID_CHAR) !== -1) {
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return uri.substring(0, uri.indexOf(CLAIM_ID_CHAR));
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}
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return uri;
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}
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function returnChannelIdFromUri (uri) {
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if (uri.indexOf(CLAIM_ID_CHAR) !== -1) {
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return uri.substring(uri.indexOf(CLAIM_ID_CHAR) + 1);
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}
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return null;
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}
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function getPage (query) {
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if (query.p) {
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return parseInt(query.p);
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@ -128,11 +109,7 @@ function sendChannelInfoAndContentToClient (result, query, res) {
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}
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}
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function showChannelPageToClient (uri, originalUrl, ip, query, res) {
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let channelName = returnChannelNameFromUri(uri);
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logger.debug('channel name =', channelName);
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let channelClaimId = returnChannelIdFromUri(uri);
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logger.debug('channel Id =', channelClaimId);
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function showChannelPageToClient (channelName, channelClaimId, originalUrl, ip, query, res) {
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// 1. retrieve the channel contents
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getChannelInfoAndContent(channelName, channelClaimId)
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.then(result => {
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@ -143,17 +120,13 @@ function showChannelPageToClient (uri, originalUrl, ip, query, res) {
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});
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}
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function characterExistsInString (character, string) {
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return (string.indexOf(character) !== -1);
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}
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function clientAcceptsHtml (headers) {
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return headers['accept'] && headers['accept'].split(',').includes('text/html');
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}
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function determineResponseType (uri, headers) {
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function determineResponseType (isServeRequest, headers) {
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let responseType;
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if (characterExistsInString('.', uri)) {
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if (isServeRequest) {
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responseType = SERVE;
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if (clientAcceptsHtml(headers)) { // this is in case a serve request comes from a browser
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responseType = SHOWLITE;
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@ -167,18 +140,6 @@ function determineResponseType (uri, headers) {
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return responseType;
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}
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function determineName (uri) {
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/* patch because twitter player preview adds '>' before file extension. */
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if (characterExistsInString('>', uri)) {
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return uri.substring(0, uri.indexOf('>'));
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}
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/* end patch */
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if (characterExistsInString('.', uri)) {
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return uri.substring(0, uri.indexOf('.'));
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}
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return uri;
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}
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function showAssetToClient (claimId, name, res) {
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return Promise
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.all([db.Claim.resolveClaim(name, claimId), db.Claim.getShortClaimIdFromLongClaimId(claimId, name)])
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@ -250,23 +211,110 @@ function logRequestData (responseType, claimName, channelName, claimId) {
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logger.debug('claim id ===', claimId);
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}
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const lbryuri = {};
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lbryuri.REGEXP_INVALID_URI = /[^A-Za-z0-9-]/g;
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lbryuri.REGEXP_ADDRESS = /^b(?=[^0OIl]{32,33})[0-9A-Za-z]{32,33}$/;
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lbryuri.parseIdentifier = function (identifier) {
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logger.debug('parsing identifier:', identifier);
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const componentsRegex = new RegExp(
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'([^:$#/]*)' + // value (stops at the first separator or end)
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'([:$#]?)([^/]*)' // modifier separator, modifier (stops at the first path separator or end)
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);
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const [proto, value, modifierSeperator, modifier] = componentsRegex
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.exec(identifier)
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.map(match => match || null);
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logger.debug(`${proto}, ${value}, ${modifierSeperator}, ${modifier}`);
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// Validate and process name
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const isChannel = value.startsWith(CHANNEL_CHAR);
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const channelName = isChannel ? value : null;
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let claimId;
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if (isChannel) {
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if (!channelName) {
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throw new Error('No channel name after @.');
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}
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const nameBadChars = (channelName).match(lbryuri.REGEXP_INVALID_URI);
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if (nameBadChars) {
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throw new Error(`Invalid characters in channel name: ${nameBadChars.join(', ')}.`);
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}
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} else {
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claimId = value;
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}
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// Validate and process modifier
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let channelClaimId;
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if (modifierSeperator) {
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if (!modifier) {
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throw new Error(`No modifier provided after separator ${modifierSeperator}.`);
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}
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if (modifierSeperator === ':') {
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channelClaimId = modifier;
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} else {
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throw new Error(`The ${modifierSeperator} modifier is not currently supported.`);
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}
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}
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return {
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isChannel,
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channelName,
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channelClaimId,
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claimId,
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};
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};
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lbryuri.parseName = function (name) {
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logger.debug('parsing name:', name);
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const componentsRegex = new RegExp(
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'([^:$#/.]*)' + // name (stops at the first modifier)
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'([:$#.]?)([^/]*)' // modifier separator, modifier (stops at the first path separator or end)
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);
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const [proto, claimName, modifierSeperator, modifier] = componentsRegex
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.exec(name)
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.map(match => match || null);
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logger.debug(`${proto}, ${claimName}, ${modifierSeperator}, ${modifier}`);
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// Validate and process name
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if (!claimName) {
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throw new Error('No claim name provided before .');
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}
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const nameBadChars = (claimName).match(lbryuri.REGEXP_INVALID_URI);
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if (nameBadChars) {
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throw new Error(`Invalid characters in claim name: ${nameBadChars.join(', ')}.`);
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}
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// Validate and process modifier
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let isServeRequest = false;
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if (modifierSeperator) {
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if (!modifier) {
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throw new Error(`No file extension provided after separator ${modifierSeperator}.`);
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}
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if (modifierSeperator !== '.') {
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throw new Error(`The ${modifierSeperator} modifier is not supported in the claim name`);
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}
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isServeRequest = true;
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}
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return {
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claimName,
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isServeRequest,
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};
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};
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module.exports = (app) => {
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// route to serve a specific asset using the channel or claim id
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app.get('/:identifier/:name', ({ headers, ip, originalUrl, params }, res) => {
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let identifier = params.identifier; // '@channel', '@channel:channelClaimId', or 'claimId'
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let name = params.name; // 'example' or 'example.ext'
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[identifier, name] = flipClaimNameAndIdForBackwardsCompatibility(identifier, name);
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let channelName = null;
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let claimId = null;
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let channelClaimId = null;
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let responseType = determineResponseType(name, headers);
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let claimName = determineName(name);
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if (isUriAChannel(identifier)) {
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channelName = returnChannelNameFromUri(identifier);
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channelClaimId = returnChannelIdFromUri(identifier);
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} else {
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claimId = identifier;
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let isChannel, channelName, channelClaimId, claimId, claimName, isServeRequest;
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try {
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({ isChannel, channelName, channelClaimId, claimId } = lbryuri.parseIdentifier(params.identifier));
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({ claimName, isServeRequest } = lbryuri.parseName(params.name));
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} catch (error) {
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logger.error(error);
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return res.status(400).json({success: false, message: error});
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}
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if (!isChannel) {
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[claimId, claimName] = flipClaimNameAndIdForBackwardsCompatibility(claimId, claimName);
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}
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let responseType = determineResponseType(isServeRequest, headers);
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// log the request data for debugging
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logRequestData(responseType, claimName, channelName, claimId);
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// get the claim Id and then serve/show the asset
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@ -284,13 +332,28 @@ module.exports = (app) => {
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});
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});
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// route to serve the winning asset at a claim or a channel page
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app.get('/:uri', ({ headers, ip, originalUrl, params, query }, res) => {
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let uri = params.uri;
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if (isUriAChannel(uri)) {
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showChannelPageToClient(uri, originalUrl, ip, query, res);
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app.get('/:identifier', ({ headers, ip, originalUrl, params, query }, res) => {
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let isChannel, channelName, channelClaimId;
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try {
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({ isChannel, channelName, channelClaimId } = lbryuri.parseIdentifier(params.identifier));
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} catch (error) {
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logger.error(error);
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return res.status(400).json({success: false, message: error});
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}
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if (isChannel) {
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// log the request data for debugging
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logRequestData(null, null, channelName, null);
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// handle showing the channel page
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showChannelPageToClient(channelName, channelClaimId, originalUrl, ip, query, res);
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} else {
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let responseType = determineResponseType(uri, headers);
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let claimName = determineName(uri);
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let claimName, isServeRequest;
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try {
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({claimName, isServeRequest} = lbryuri.parseName(params.identifier));
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} catch (error) {
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logger.error(error);
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return res.status(400).json({success: false, message: error});
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}
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let responseType = determineResponseType(isServeRequest, headers);
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// log the request data for debugging
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logRequestData(responseType, claimName, null, null);
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// get the claim Id and then serve/show the asset
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