From 1bf5278d3088c9b366c19937130c030b41c7cee0 Mon Sep 17 00:00:00 2001
From: cel <cel@lOUVT+Phkvai9a/cCS/RKo+S9hnPAQdVixms/7ldpPA=.ed25519>
Date: Thu, 26 Nov 2020 18:40:05 -0500
Subject: Support ssb-uri in request URLs and search

---
 lib/serve.js | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'lib/serve.js')

diff --git a/lib/serve.js b/lib/serve.js
index f09bd2f..aad2510 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -25,11 +25,13 @@ var split = require('pull-split')
 var utf8 = require('pull-utf8-decoder')
 var webresolve = require('ssb-web-resolver')
 var Url = require('url')
+var Base64URL = require('base64-url')
 
 module.exports = Serve
 
 var hlCssDir = path.join(require.resolve('highlight.js'), '../../styles')
 
+var ssbURIRegex = /^(?:\/+)(ssb:(message|blob|feed)([:\/])([^:?]*?)([:/])([^?]*)(\\?.*)?)$/
 var urlIdRegex = /^(?:\/+(([%&@]|%25|%26)(?:[A-Za-z0-9\/+]|%2[Ff]|%2[Bb]){43}(?:=|%3D)\.(?:sha256|ed25519))([^?]*)?|(\/.*?))(?:\?(.*))?$/
 
 function ctype(name) {
@@ -448,6 +450,33 @@ Serve.prototype.publishMayRedirect = function (content, cb) {
   }
 }
 
+Serve.prototype.translateFromURI = function (url) {
+  var m = ssbURIRegex.exec(url)
+  if (!m) return
+  var uri = m[1]
+  var prefix = m[2]
+  var separator = m[3]
+  var format = m[4]
+  var separator2 = m[5]
+  var hash = m[6]
+  var qs = m[7] || ''
+  if (separator !== separator2) return
+  hash = Base64URL.unescape(hash)
+  if (separator === '/') {
+    // ssb-custom-uri
+    try { hash = decodeURIComponent(hash) }
+    catch(e) {}
+  }
+  var sigil
+  switch (prefix) {
+    case 'message': sigil = '%'; break
+    case 'blob': sigil = '&'; break
+    case 'feed': sigil = '@'; break
+    default: return
+  }
+  return sigil + hash + '.' + format + qs
+}
+
 Serve.prototype.handle = function () {
   var m = urlIdRegex.exec(this.req.url)
   this.query = m[5] ? qs.parse(m[5]) : {}
@@ -499,6 +528,10 @@ Serve.prototype.redirect = function (dest) {
 }
 
 Serve.prototype.path = function (url) {
+  if (url.substr(0, 5) === '/ssb:') {
+    var link = this.translateFromURI(url)
+    if (link) return this.redirect(this.app.render.toUrl(link))
+  }
   var m
   url = url.replace(/^\/+/, '/')
   switch (url) {
@@ -732,6 +765,8 @@ Serve.prototype.search = function (ext) {
     var maybeId = searchQ.substr(6)
     if (u.isRef(maybeId)) searchQ = maybeId
   }
+  var link = this.translateFromURI('/' + searchQ)
+  if (link) return self.redirect(self.app.render.toUrl(link))
 
   if (u.isRef(searchQ) || searchQ[0] === '#') {
     return self.redirect(self.app.render.toUrl(searchQ))
-- 
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