diff options
Diffstat (limited to 'main_background.js')
| -rw-r--r-- | main_background.js | 173 |
1 files changed, 85 insertions, 88 deletions
diff --git a/main_background.js b/main_background.js index f9c5dac..cdc987e 100644 --- a/main_background.js +++ b/main_background.js @@ -599,6 +599,8 @@ function full_evaluate(script){ * This can only determine if a script is bad, not if it's good * * If it passes the intitial pass, it runs the full pass and returns the result + +* It returns an array of [flag (boolean, false if "bad"), reason (string, human readable report)] * */ function evaluate(script,name){ @@ -636,27 +638,24 @@ function evaluate(script,name){ return [flag,reason]; } - var final = full_evaluate(script); -// final[1] = final[1] + "<br>"; - return final; + return full_evaluate(script); } -function license_valid(matches){ - if(matches.length != 4){ - return [false, "malformed or unrecognized license tag"]; - } - if(matches[1] != "@license"){ - return [false, "malformed or unrecognized license tag"]; +function validateLicense(matches) { + if (!(Array.isArray(matches) && matches.length === 4)){ + return [false, "Malformed or unrecognized license tag."]; } - if(licenses[matches[3]] === undefined){ - return [false, "malformed or unrecognized license tag"]; + let [all, tag, link, id] = matches; + let license = licenses[id]; + if(!license){ + return [false, `Unrecognized license "${id}"`]; } - if(licenses[matches[3]]["Magnet link"] != matches[2]){ - return [false, "malformed or unrecognized license tag"]; + if(license["Magnet link"] != link){ + return [false, `License magnet link does not match for "${id}".`]; } - return [true,"Recognized license as '"+matches[3]+"'<br>"]; + return [true, `Recognized license: "${id}".`]; } /** * @@ -669,91 +668,89 @@ function license_valid(matches){ * reason text * ] */ -function license_read(script_src, name, external = false){ - - var reason_text = ""; - - var edited_src = ""; - var unedited_src = script_src; - var nontrivial_status; - var parts_denied = false; - var parts_accepted = false; - var license = legacy_license_lib.check(script_src); - if(license != false){ - return [true,script_src,"Licensed under: "+license]; +function license_read(scriptSrc, name, external = false){ + + let license = legacy_license_lib.check(scriptSrc); + if (license){ + return [true, scriptSrc, `Licensed under: ${license}`]; } - if (listManager.builtInHashes.has(hash(script_src))){ - return [true,script_src,"Common script known to be free software."]; + if (listManager.builtInHashes.has(hash(scriptSrc))){ + return [true, scriptSrc, "Common script known to be free software."]; } - while(true){ // TODO: refactor me - // TODO: support multiline comments - var matches = /\/[\/\*]\s*?(@license)\s([\S]+)\s([\S]+$)/gm.exec(unedited_src); - var empty = /[^\s]/gm.exec(unedited_src); - if(empty == null){ - return [true,edited_src,reason_text]; + + let editedSrc = ""; + let uneditedSrc = scriptSrc.trim(); + let reason = uneditedSrc ? "" : "Empty source."; + let partsDenied = false; + let partsAccepted = false; + + function checkTriviality(s) { + if (!s.trim()) { + return true; // empty, ignore it } - if(matches == null){ - if (external) - return [false,edited_src,"External script with no known license."]; - else - nontrivial_status = evaluate(unedited_src,name); - if(nontrivial_status[0] == true){ - parts_accepted = true; - edited_src += unedited_src; - } else{ - parts_denied = true; - edited_src += "\n/*\nLIBREJS BLOCKED:"+nontrivial_status[1]+"\n*/\n"; - } - reason_text += "\n" + nontrivial_status[1]; + let [trivial, message] = external ? + [false, "External script with no known license"] + : evaluate(s, name); + if (trivial) { + partsAccepted = true; + editedSrc += s; + } else { + partsDenied = true; + editedSrc += `\n/*\nLIBREJS BLOCKED: ${message}\n*/\n`; + } + reason += `\n${message}`; + return trivial; + } - if(parts_denied == true && parts_accepted == true){ - reason_text = "Script was determined partly non-trivial after editing. (check source for details)\n"+reason_text; - } - if(parts_denied == true && parts_accepted == false){ - return [false,edited_src,reason_text]; - } - else return [true,edited_src,reason_text]; + while (uneditedSrc) { + let openingMatch = /\/[\/\*]\s*?(@license)\s+(\S+)\s+(\S+)\s*$/mi.exec(uneditedSrc); + if (!openingMatch) { // no license found, check for triviality + checkTriviality(uneditedSrc); + break; + } + let openingIndex = openingMatch.index; + if (openingIndex) { + // let's check the triviality of the code before the license tag, if any + checkTriviality(uneditedSrc.substring(0, openingIndex)); } - // sponge - dbg_print("undedited_src:"); - dbg_print(unedited_src); - dbg_print(matches); - dbg_print("chopping at " + matches["index"] + "."); - var before = unedited_src.substring(0,matches["index"]); - // sponge - dbg_print("before:"); - dbg_print(before); - if (external) - nontrivial_status = [true, "External script with no known license"] - else - nontrivial_status = evaluate(before,name); - if(nontrivial_status[0] == true){ - parts_accepted = true; - edited_src += before; - } else{ - parts_denied = true; - edited_src += "\n/*\nLIBREJS BLOCKED:"+nontrivial_status[1]+"\n*/\n"; + // let's check the actual license + uneditedSrc = uneditedSrc.substring(openingIndex); + + let closureMatch = /\/([*/])\s*@license-end\b[^*/\n]*/i.exec(uneditedSrc); + if (!closureMatch) { + let msg = "ERROR: @license with no @license-end"; + return [false, `\n/*\n ${msg} \n*/\n`, msg]; } - unedited_src = unedited_src.substr(matches["index"],unedited_src.length); - // TODO: support multiline comments - var matches_end = /\/\/\s*?(@license-end)/gm.exec(unedited_src); - if(matches_end == null){ - dbg_print("ERROR: @license with no @license-end"); - return [false,"\n/*\n ERROR: @license with no @license-end \n*/\n","ERROR: @license with no @license-end"]; + + let closureEndIndex = closureMatch.index + closureMatch[0].length; + let commentEndOffset = uneditedSrc.substring(closureEndIndex).indexOf(closureMatch[1] === "*" ? "*/" : "\n"); + if (commentEndOffset !== -1) { + closureEndIndex += commentEndOffset; } - var endtag_end_index = matches_end["index"]+matches_end[0].length; - var license_res = license_valid(matches); - if(license_res[0] == true){ - edited_src = edited_src + unedited_src.substr(0,endtag_end_index); - reason_text += "\n" + license_res[1]; - } else{ - edited_src = edited_src + "\n/*\n"+license_res[1]+"\n*/\n"; - reason_text += "\n" + license_res[1]; + + let [licenseOK, message] = validateLicense(openingMatch); + if(licenseOK) { + editedSrc += uneditedSrc.substr(0, closureEndIndex); + partsAccepted = true; + } else { + editedSrc += `\n/*\n${message}\n*/\n`; + partsDenied = true; } + reason += `\n${message}`; + // trim off everything we just evaluated - unedited_src = unedited_src.substr(endtag_end_index,unedited_src.length); + uneditedSrc = uneditedSrc.substring(closureEndIndex).trim(); + } + + if(partsDenied) { + if (partsAccepted) { + reason = `Some parts of the script have been disabled (check the source for details).\n^--- ${reason}`; + } + return [false, editedSrc, reason]; } + + return [true, scriptSrc, reason]; } /* *********************************************************************************************** */ |