mirror of
https://github.com/Aminark/legado-ios.git
synced 2026-10-24 12:51:22 +08:00
feat: open-source 小浣熊阅读 for iOS
This commit is contained in:
Aminark
@@ -0,0 +1,105 @@
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import Foundation
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#if canImport(FoundationXML)
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import FoundationXML
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#endif
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public struct RSSParseResult: Sendable, Equatable {
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public var articles: [RssArticle]
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public var nextURL: String?
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public init(articles: [RssArticle], nextURL: String? = nil) {
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self.articles = articles
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self.nextURL = nextURL
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}
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}
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public enum RSSDefaultParser {
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public static func parse(sortName: String, xml: String, sourceURL: String) throws -> RSSParseResult {
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let delegate = Delegate(sortName: sortName, sourceURL: sourceURL)
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let parser = XMLParser(data: Data(xml.utf8))
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parser.shouldProcessNamespaces = false
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parser.delegate = delegate
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guard parser.parse() else { throw parser.parserError ?? RSSParserError.invalidXML }
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return .init(articles: delegate.articles)
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}
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private final class Delegate: NSObject, XMLParserDelegate {
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let sortName: String
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let sourceURL: String
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var articles: [RssArticle] = []
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var article = RssArticle()
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var insideItem = false
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var activeField: String?
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var text = ""
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init(sortName: String, sourceURL: String) {
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self.sortName = sortName
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self.sourceURL = sourceURL
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}
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func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String: String] = [:]) {
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let name = elementName.lowercased()
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if name == "item" { insideItem = true; article = RssArticle(); return }
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guard insideItem else { return }
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if name == "media:thumbnail" {
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article.image = attribute(attributeDict, named: "url")
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} else if name == "enclosure", attribute(attributeDict, named: "type")?.localizedCaseInsensitiveContains("image/") == true {
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article.image = attribute(attributeDict, named: "url")
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}
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if ["title", "link", "description", "content:encoded", "pubdate", "time"].contains(name) {
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activeField = name
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text = ""
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}
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}
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func parser(_ parser: XMLParser, foundCharacters string: String) {
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if insideItem, activeField != nil { text += string }
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}
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func parser(_ parser: XMLParser, foundCDATA CDATABlock: Data) {
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if insideItem, activeField != nil { text += String(decoding: CDATABlock, as: UTF8.self) }
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}
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func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
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let name = elementName.lowercased()
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if name == "item" {
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article.origin = sourceURL; article.sort = sortName; articles.append(article)
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insideItem = false; activeField = nil
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return
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}
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guard insideItem, name == activeField else { return }
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let value = text.trimmingCharacters(in: .whitespacesAndNewlines)
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switch name {
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case "title": article.title = value
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case "link": article.link = value
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case "description": article.description = value; if article.image == nil { article.image = firstImageURL(in: text) }
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case "content:encoded": article.content = value; if article.image == nil { article.image = firstImageURL(in: text) }
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case "pubdate", "time": article.pubDate = value
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default: break
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}
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activeField = nil; text = ""
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}
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private func attribute(_ values: [String: String], named name: String) -> String? {
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values.first { $0.key.caseInsensitiveCompare(name) == .orderedSame }?.value
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}
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private func firstImageURL(in input: String) -> String? {
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guard let expression = try? NSRegularExpression(pattern: "(<img [^>]*>)", options: .caseInsensitive),
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let image = expression.firstMatch(in: input, range: NSRange(input.startIndex..., in: input)),
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let tagRange = Range(image.range(at: 1), in: input) else { return nil }
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let tag = String(input[tagRange])
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guard let expression = try? NSRegularExpression(pattern: #"src\s*=\s*\"([^\"]+)\""#, options: .caseInsensitive),
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let source = expression.firstMatch(in: tag, range: NSRange(tag.startIndex..., in: tag)),
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let sourceRange = Range(source.range(at: 1), in: tag) else { return nil }
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return String(tag[sourceRange]).trimmingCharacters(in: .whitespacesAndNewlines)
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}
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}
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}
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public enum RSSParserError: Error, LocalizedError, Sendable {
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case invalidXML
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case emptyBody(String)
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public var errorDescription: String? {
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switch self {
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case .invalidXML: "RSS XML解析失败"
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case .emptyBody(let source): "获取网页内容失败：\(source)"
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}
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}
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}
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@@ -0,0 +1,130 @@
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import Foundation
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public enum RSSReadingMode: Equatable, Sendable {
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case html(content: String, baseURL: String?)
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case startHTML(content: String, baseURL: String?)
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case web(url: String)
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case image(url: String)
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case video(url: String)
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}
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public struct RSSReadingPolicy: Sendable {
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public init() {}
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public func mode(article: RssArticle, source: RssSource, resolvedContent: String? = nil) -> RSSReadingMode {
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if article.type == 1 || article.type == 2 {
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let raw = resolvedContent?.trimmed.nilIfEmpty ?? article.link
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let articleURL = absoluteURL(article.link, base: article.origin)
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let url = absoluteURL(raw, base: articleURL)
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return article.type == 1 ? .image(url: url) : .video(url: url)
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}
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if let description = article.description?.trimmed.nilIfEmpty {
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return .html(content: description, baseURL: source.loadWithBaseUrl ? absoluteURL(article.link, base: article.origin) : nil)
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}
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if source.ruleContent?.trimmed.nilIfEmpty != nil, let content = resolvedContent {
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return .html(content: content, baseURL: source.loadWithBaseUrl ? absoluteURL(article.link, base: article.origin) : nil)
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}
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return .web(url: absoluteURL(article.link, base: article.origin))
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}
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private func absoluteURL(_ value: String, base: String) -> String {
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URL(string: value, relativeTo: URL(string: base))?.absoluteURL.absoluteString ?? value
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}
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}
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public struct RSSHTMLProcessor: Sendable {
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public static let defaultStyle = "img{max-width:100% !important; width:auto; height:auto;}video{object-fit:fill; max-width:100% !important; width:auto; height:auto;}body{word-wrap:break-word; height:auto;max-width: 100%; width:auto;}"
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public init() {}
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public func contentHTML(_ content: String, style: String?) -> String {
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injectStyle(into: content, style: style?.trimmed.nilIfEmpty ?? Self.defaultStyle)
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}
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public func startHTML(_ content: String, source: RssSource) -> String {
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var html: String
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if let script = source.startJs?.trimmed.nilIfEmpty {
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if let range = content.range(of: "</body>") {
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html = String(content[..<range.lowerBound]) + "<script>\(script)</script>" + String(content[range.lowerBound...])
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} else {
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html = "<body>\(content)<script>\(script)</script></body>"
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}
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} else { html = content }
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return contentHTML(html, style: source.startStyle?.trimmed.nilIfEmpty ?? source.style)
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}
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private func injectStyle(into content: String, style: String) -> String {
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let tag = "<style>\(style)</style>"
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if let range = content.range(of: "</style>") {
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return String(content[..<range.upperBound]) + tag + String(content[range.upperBound...])
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}
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if let range = content.range(of: "</head>") {
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return String(content[..<range.lowerBound]) + tag + String(content[range.lowerBound...])
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}
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return tag + content
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}
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}
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public struct RSSStartPageResolver: Sendable {
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public init() {}
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public func resolve(_ source: RssSource) throws -> RSSReadingMode? {
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guard let raw = source.startHtml?.trimmingCharacters(in: .whitespacesAndNewlines), !raw.isEmpty else { return nil }
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let html: String
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if raw.hasPrefix("@js:") {
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let result = try JavaScriptRuleEvaluator().evaluate(script: String(raw.dropFirst(4)), result: .string(""), executionContext: .init(baseURL: source.sourceUrl, source: source.bookSourceAdapter))
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html = result.value.stringValue
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} else if raw.hasPrefix("<js>"), let end = raw.range(of: "</js>", options: .backwards) {
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let script = String(raw[raw.index(raw.startIndex, offsetBy: 4)..<end.lowerBound])
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let result = try JavaScriptRuleEvaluator().evaluate(script: script, result: .string(""), executionContext: .init(baseURL: source.sourceUrl, source: source.bookSourceAdapter))
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html = result.value.stringValue
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} else { html = raw }
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return .startHTML(content: html, baseURL: source.loadWithBaseUrl ? source.sourceUrl : nil)
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}
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}
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public struct RSSResourcePolicy: Sendable {
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private let blacklist: [String]
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private let whitelist: [String]
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public init(blacklist: String?, whitelist: String?) {
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self.blacklist = Self.rules(blacklist)
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self.whitelist = Self.rules(whitelist)
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}
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public func allows(_ url: String) -> Bool {
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if !blacklist.isEmpty { return !blacklist.contains { matches(url, rule: $0) } }
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if !whitelist.isEmpty { return whitelist.contains { matches(url, rule: $0) } }
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return true
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}
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public func contentBlockerJSON() -> String? {
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var rules: [[String: Any]] = []
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if !blacklist.isEmpty {
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for value in blacklist {
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rules.append(["trigger": ["url-filter": filter(for: value)], "action": ["type": "block"]])
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}
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} else if !whitelist.isEmpty {
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rules.append(["trigger": ["url-filter": ".*"], "action": ["type": "block"]])
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for value in whitelist {
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rules.append(["trigger": ["url-filter": filter(for: value)], "action": ["type": "ignore-previous-rules"]])
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}
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}
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guard !rules.isEmpty, let data = try? JSONSerialization.data(withJSONObject: rules) else { return nil }
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return String(decoding: data, as: UTF8.self)
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}
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private func matches(_ value: String, rule: String) -> Bool {
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if value.hasPrefix(rule) { return true }
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guard let expression = try? NSRegularExpression(pattern: rule) else { return false }
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let range = NSRange(value.startIndex..., in: value)
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guard let match = expression.firstMatch(in: value, range: range) else { return false }
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return match.range == range
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}
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private func filter(for rule: String) -> String {
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let literalPrefix = "^" + NSRegularExpression.escapedPattern(for: rule)
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return "(?:\(literalPrefix))|(?:^(?:\(rule))$)"
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}
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private static func rules(_ value: String?) -> [String] {
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value?.split(separator: ",").map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }.filter { !$0.isEmpty } ?? []
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}
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}
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private extension String {
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var trimmed: String { trimmingCharacters(in: .whitespacesAndNewlines) }
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var nilIfEmpty: String? { isEmpty ? nil : self }
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}
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@@ -0,0 +1,107 @@
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import Foundation
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public struct RSSRuleParseReport: Sendable {
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public var result: RSSParseResult
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public var diagnostics: [RuleDiagnostic]
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public init(result: RSSParseResult, diagnostics: [RuleDiagnostic] = []) {
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self.result = result
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self.diagnostics = diagnostics
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}
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}
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public struct RSSRuleParser: Sendable {
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private let engine: RuleEngine
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public init(engine: RuleEngine = .init()) { self.engine = engine }
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public func parse(
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sortName: String,
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sortURL: String,
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redirectURL: String,
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body: String,
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source: RssSource,
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variables: [String: String] = [:]
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) async throws -> RSSRuleParseReport {
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guard !body.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
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throw RSSParserError.emptyBody(source.sourceUrl)
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}
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guard var listRule = source.ruleArticles, !listRule.isEmpty else {
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return .init(result: try RSSDefaultParser.parse(sortName: sortName, xml: body, sourceURL: source.sourceUrl))
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}
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let reverse = listRule.hasPrefix("-")
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if reverse { listRule.removeFirst() }
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let adapter = source.bookSourceAdapter
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let baseContext = RuleExecutionContext(variables: variables, baseURL: sortURL, source: adapter)
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let list = await engine.evaluate(listRule, inText: body, baseURL: sortURL, listMode: true, context: baseContext)
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var diagnostics = list.diagnostics
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var nextURL: String?
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if let nextRule = source.ruleNextPage, !nextRule.isEmpty {
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if nextRule.uppercased() == "PAGE" {
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nextURL = sortURL
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} else {
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let next = await engine.evaluate(nextRule, inText: body, baseURL: sortURL, context: .init(variables: list.variables, baseURL: sortURL, source: adapter))
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diagnostics += next.diagnostics
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if let value = next.joinedString, !value.isEmpty {
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nextURL = URL(string: value, relativeTo: URL(string: sortURL))?.absoluteURL.absoluteString ?? value
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}
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}
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}
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let variable = encodeVariables(list.variables)
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var articles: [RssArticle] = []
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for item in flatten(list.values) {
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var context = RuleExecutionContext(variables: list.variables, baseURL: sortURL, source: adapter)
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let title = await evaluate(source.ruleTitle, item: item, context: context); context.variables = title.variables
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let pubDate = await evaluate(source.rulePubDate, item: item, context: context); context.variables = pubDate.variables
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let description = await evaluate(source.ruleDescription, item: item, context: context); context.variables = description.variables
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let image = await evaluate(source.ruleImage, item: item, context: context); context.variables = image.variables
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let link = await evaluate(source.ruleLink, item: item, context: context)
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diagnostics += [title, pubDate, description, image, link].flatMap(\.diagnostics)
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guard let titleValue = title.joinedString?.trimmingCharacters(in: .whitespacesAndNewlines), !titleValue.isEmpty else { continue }
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let rawLink = link.leadingString ?? ""
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let resolvedLink = URL(string: rawLink, relativeTo: URL(string: sortURL))?
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.absoluteURL.absoluteString ?? rawLink
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var article = RssArticle(origin: source.sourceUrl, sort: sortName, title: titleValue, link: resolvedLink)
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article.pubDate = pubDate.joinedString
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article.description = source.ruleDescription?.isEmpty == false ? description.joinedString : nil
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if let imageValue = image.joinedString, !imageValue.isEmpty {
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article.image = URL(string: imageValue, relativeTo: URL(string: source.sourceUrl))?.absoluteURL.absoluteString ?? imageValue
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}
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article.variable = variable
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article.type = source.type
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articles.append(article)
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}
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if reverse { articles.reverse() }
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_ = redirectURL
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return .init(result: .init(articles: articles, nextURL: nextURL), diagnostics: diagnostics)
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}
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private func evaluate(_ rule: String?, item: JSONValue, context: RuleExecutionContext) async -> RuleEvaluation {
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guard let rule, !rule.isEmpty else { return .init(variables: context.variables) }
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if case .string(let text) = item {
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return await engine.evaluate(rule, inText: text, baseURL: context.baseURL, context: context)
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}
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return await engine.evaluate(rule, in: item, context: context)
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}
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private func flatten(_ values: [JSONValue]) -> [JSONValue] {
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values.flatMap { value in
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if case .array(let items) = value { return items }
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return [value]
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}
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}
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private func encodeVariables(_ values: [String: String]) -> String? {
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guard !values.isEmpty, let data = try? JSONEncoder().encode(values) else { return nil }
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return String(decoding: data, as: UTF8.self)
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}
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}
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extension RssSource {
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var bookSourceAdapter: BookSource {
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var value = BookSource(bookSourceUrl: sourceUrl, bookSourceName: sourceName)
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value.bookSourceGroup = sourceGroup; value.bookSourceType = type; value.customOrder = customOrder
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value.enabled = enabled; value.jsLib = jsLib; value.enabledCookieJar = enabledCookieJar
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value.concurrentRate = concurrentRate; value.header = header; value.loginUrl = loginUrl
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value.loginUi = loginUi; value.loginCheckJs = loginCheckJs; value.coverDecodeJs = coverDecodeJs
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value.bookSourceComment = sourceComment; value.variableComment = variableComment
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value.lastUpdateTime = lastUpdateTime; value.searchUrl = searchUrl
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return value
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}
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}
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@@ -0,0 +1,132 @@
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import Foundation
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public struct RSSFetchResult: Sendable {
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public var requestURL: String
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public var finalURL: String
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public var statusCode: Int
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public var body: String
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public var report: RSSRuleParseReport
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}
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public struct RSSContentFetchResult: Sendable {
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public var requestURL: String
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public var finalURL: String
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public var statusCode: Int
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public var body: String
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public var content: String
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public var diagnostics: [RuleDiagnostic]
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}
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public struct RSSService: Sendable {
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private let transport: any HTTPTransport
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private let urlBuilder: LegadoURLBuilder
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private let engine: RuleEngine
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private let parser: RSSRuleParser
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private let networkPolicy: SourceNetworkPolicy
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private let webViewExecutor: (any SourceWebViewRequestExecuting)?
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public init(
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transport: any HTTPTransport = URLSessionHTTPTransport(),
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urlBuilder: LegadoURLBuilder = .init(),
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engine: RuleEngine = .init(),
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networkPolicy: SourceNetworkPolicy = .shared,
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webViewExecutor: (any SourceWebViewRequestExecuting)? = nil
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) {
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self.transport = transport
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self.urlBuilder = urlBuilder
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self.engine = engine
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self.parser = RSSRuleParser(engine: engine)
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self.networkPolicy = networkPolicy
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self.webViewExecutor = webViewExecutor
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}
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public func articles(
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sortName: String,
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sortURL: String,
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source: RssSource,
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page: Int,
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key: String? = nil
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) async throws -> RSSRuleParseReport {
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try await articlesDetailed(sortName: sortName, sortURL: sortURL, source: source, page: page, key: key).report
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}
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public func articlesDetailed(
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sortName: String,
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sortURL: String,
|
||||
source: RssSource,
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page: Int,
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||||
key: String? = nil
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) async throws -> RSSFetchResult {
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let adapter = source.bookSourceAdapter
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let headers = try BookSourceHeaderResolver().resolve(adapter)
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let prepared = try urlBuilder.prepare(
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sortURL,
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context: .init(key: key, page: page, source: adapter),
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||||
baseURL: URL(string: source.sourceUrl),
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||||
defaultHeaders: headers
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||||
)
|
||||
let response = try await networkPolicy.execute(
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||||
prepared,
|
||||
source: adapter,
|
||||
transport: transport,
|
||||
timeout: 180,
|
||||
webViewExecutor: webViewExecutor,
|
||||
snapshotStage: .debug
|
||||
)
|
||||
let report = try await parser.parse(
|
||||
sortName: sortName,
|
||||
sortURL: sortURL,
|
||||
redirectURL: response.finalURL.absoluteString,
|
||||
body: response.decodedText,
|
||||
source: source,
|
||||
variables: response.requestVariables
|
||||
)
|
||||
return .init(
|
||||
requestURL: prepared.url.absoluteString,
|
||||
finalURL: response.finalURL.absoluteString,
|
||||
statusCode: response.statusCode,
|
||||
body: response.decodedText,
|
||||
report: report
|
||||
)
|
||||
}
|
||||
|
||||
public func content(article: RssArticle, rule: String, source: RssSource) async throws -> String {
|
||||
try await contentDetailed(article: article, rule: rule, source: source).content
|
||||
}
|
||||
|
||||
public func contentDetailed(article: RssArticle, rule: String, source: RssSource) async throws -> RSSContentFetchResult {
|
||||
let adapter = source.bookSourceAdapter
|
||||
let headers = try BookSourceHeaderResolver().resolve(adapter)
|
||||
let prepared = try urlBuilder.prepare(
|
||||
article.link,
|
||||
context: .init(variables: article.variableMap, source: adapter),
|
||||
baseURL: URL(string: article.origin),
|
||||
defaultHeaders: headers
|
||||
)
|
||||
let response = try await networkPolicy.execute(
|
||||
prepared,
|
||||
source: adapter,
|
||||
transport: transport,
|
||||
timeout: 180,
|
||||
webViewExecutor: webViewExecutor,
|
||||
snapshotStage: .content
|
||||
)
|
||||
let result = await engine.evaluate(
|
||||
rule,
|
||||
inText: response.decodedText,
|
||||
baseURL: URL(string: article.link, relativeTo: URL(string: article.origin))?.absoluteURL.absoluteString ?? article.link,
|
||||
context: .init(variables: article.variableMap, baseURL: response.finalURL.absoluteString, source: adapter)
|
||||
)
|
||||
if let error = result.diagnostics.first(where: { $0.severity == .error }) {
|
||||
throw RuleEngineError.malformedRule(rule: rule, detail: error.message)
|
||||
}
|
||||
return .init(
|
||||
requestURL: prepared.url.absoluteString,
|
||||
finalURL: response.finalURL.absoluteString,
|
||||
statusCode: response.statusCode,
|
||||
body: response.decodedText,
|
||||
content: result.joinedString ?? "",
|
||||
diagnostics: result.diagnostics
|
||||
)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,33 @@
|
||||
import Foundation
|
||||
|
||||
public struct RSSSort: Hashable, Identifiable, Sendable {
|
||||
public var name: String
|
||||
public var url: String
|
||||
public var id: String { "\(name)\u{0}\(url)" }
|
||||
public init(name: String, url: String) { self.name = name; self.url = url }
|
||||
}
|
||||
|
||||
public struct RSSSortResolver: Sendable {
|
||||
private let engine: RuleEngine
|
||||
public init(engine: RuleEngine = .init()) { self.engine = engine }
|
||||
|
||||
public func resolve(_ source: RssSource) async -> [RSSSort] {
|
||||
var value = source.sortUrl
|
||||
if let rule = value, rule.hasPrefix("@js:") || rule.hasPrefix("<js>") {
|
||||
let result = await engine.evaluate(rule, in: .null, context: .init(source: source.bookSourceAdapter))
|
||||
value = result.joinedString
|
||||
}
|
||||
guard let value else { return [.init(name: "", url: source.sourceUrl)] }
|
||||
let pattern = try? NSRegularExpression(pattern: "(?:&&|\\n)+")
|
||||
let range = NSRange(value.startIndex..., in: value)
|
||||
let normalized = pattern?.stringByReplacingMatches(in: value, range: range, withTemplate: "\u{1F}") ?? value
|
||||
let sorts = normalized.split(separator: "\u{1F}", omittingEmptySubsequences: true).compactMap { item -> RSSSort? in
|
||||
let text = String(item)
|
||||
let parts = text.components(separatedBy: "::")
|
||||
let name = parts.first ?? ""
|
||||
let url = parts.dropFirst().joined(separator: "::")
|
||||
return url.isEmpty ? nil : .init(name: name, url: url)
|
||||
}
|
||||
return sorts.isEmpty ? [.init(name: "", url: source.sourceUrl)] : sorts
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user