Create CommonErrors module.

ReaderAPI/Sources/ReaderAPI/URLRequest+ReaderAPI.swift

@@ -0,0 +1,55 @@
+//
+//  URLRequest+ReaderAPI.swift
+//
+//
+//  Created by Brent Simmons on 4/6/24.
+//
+
+import Foundation
+import Secrets
+import Web
+
+extension URLRequest {
+
+	init(url: URL, readerAPICredentials: Credentials?, conditionalGet: HTTPConditionalGetInfo? = nil) {
+
+		self.init(url: url)
+
+		guard let credentials = readerAPICredentials else {
+			return
+		}
+
+		let credentialsType = credentials.type
+		precondition(credentialsType == .readerBasic || credentialsType == .readerAPIKey)
+
+		if credentialsType == .readerBasic {
+
+			setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
+			httpMethod = "POST"
+			var postData = URLComponents()
+			postData.queryItems = [
+				URLQueryItem(name: "Email", value: credentials.username),
+				URLQueryItem(name: "Passwd", value: credentials.secret)
+			]
+			httpBody = postData.enhancedPercentEncodedQuery?.data(using: .utf8)
+
+		} else if credentialsType == .readerAPIKey {
+
+			let auth = "GoogleLogin auth=\(credentials.secret)"
+			setValue(auth, forHTTPHeaderField: HTTPRequestHeader.authorization)
+		}
+
+		guard let conditionalGet = conditionalGet else {
+			return
+		}
+
+		// Bug seen in the wild: lastModified with last possible 32-bit date, which is in 2038. Ignore those.
+		// TODO: drop this check in late 2037.
+		if let lastModified = conditionalGet.lastModified, !lastModified.contains("2038") {
+			setValue(lastModified, forHTTPHeaderField: HTTPRequestHeader.ifModifiedSince)
+		}
+		if let etag = conditionalGet.etag {
+			setValue(etag, forHTTPHeaderField: HTTPRequestHeader.ifNoneMatch)
+		}
+	}
+}