From b8e57d7446356b7c659e335bf1e652f9f09682bf Mon Sep 17 00:00:00 2001
From: tsaitang404 <tsaitang404@users.noreply.github.com>
Date: Wed, 3 Jun 2026 14:43:04 +0800
Subject: [PATCH] Translate,Utils,GoogleTranslate: add HTTPS/TLS support via
 curl

gawk's /inet/tcp does not support TLS, causing engines that use HTTPS
endpoints (e.g. translate.googleapis.com) to silently return empty
responses ("Null response" error).

Changes:
- GoogleTranslate: switch HttpProtocol to https:// on port 443
- initHttpService: detect https:// and set UseHttps flag, skip gawk TCP
- getResponse: when UseHttps, delegate to new curlGetResponse()
- postResponse: when UseHttps, delegate to curlPost()
- Utils: add curlGetResponse() supporting proxy/cookie/user-agent

The fix is generic: any future engine requiring HTTPS only needs to set
HttpProtocol = "https://" in its init function.
---
 include/Translate.awk                   | 20 ++++++++++++++++++
 include/Translators/GoogleTranslate.awk |  4 ++--
 include/Utils.awk                       | 27 +++++++++++++++++++++++++
 3 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/include/Translate.awk b/include/Translate.awk
index e5f171f7..53ed39be 100644
--- a/include/Translate.awk
+++ b/include/Translate.awk
@@ -62,6 +62,14 @@ function initPager() {
 function initHttpService(    inet) {
     _Init()
 
+    if (HttpProtocol == "https://") {
+        # gawk's /inet/tcp does not support TLS; signal callers to use curl
+        UseHttps = 1
+        HttpPathPrefix = (Option["proxy"] ? HttpProtocol HttpHost : "")
+        return
+    }
+
+    UseHttps = 0
     inet = "inet"
     if (Option["ip-version"])
         inet = inet Option["ip-version"]
@@ -109,6 +117,11 @@ function getResponse(text, sl, tl, hl,
                      content, header, isBody, url, group, status, location) {
     url = _RequestUrl(text, sl, tl, hl)
 
+    # gawk's /inet/tcp has no TLS support; delegate HTTPS requests to curl
+    if (UseHttps)
+        return assert(curlGetResponse(HttpProtocol HttpHost url),
+                      "[ERROR] Null response.")
+
     header = "GET " url " HTTP/1.1\r\n"           \
         "Host: " HttpHost "\r\n"                  \
         "Connection: close\r\n"
@@ -169,6 +182,13 @@ function postResponse(text, sl, tl, hl, type,
                       content, contentLength, contentType, group,
                       header, isBody, reqBody, url, status, location, userAgent) {
     url = _PostRequestUrl(text, sl, tl, hl, type)
+
+    # gawk's /inet/tcp has no TLS support; delegate HTTPS requests to curl
+    if (UseHttps) {
+        reqBody = _PostRequestBody(text, sl, tl, hl, type)
+        return curlPost(HttpProtocol HttpHost url, reqBody)
+    }
+
     contentType = _PostRequestContentType(text, sl, tl, hl, type)
     userAgent = _PostRequestUserAgent(text, sl, tl, hl, type)
     reqBody = _PostRequestBody(text, sl, tl, hl, type)
diff --git a/include/Translators/GoogleTranslate.awk b/include/Translators/GoogleTranslate.awk
index 802eefc2..d9044f09 100644
--- a/include/Translators/GoogleTranslate.awk
+++ b/include/Translators/GoogleTranslate.awk
@@ -48,9 +48,9 @@ function genTK(text,
 }
 
 function googleInit() {
-    HttpProtocol = "http://"
+    HttpProtocol = "https://"
     HttpHost = "translate.googleapis.com"
-    HttpPort = 80
+    HttpPort = 443
 }
 
 function googleRequestUrl(text, sl, tl, hl,    qc) {
diff --git a/include/Utils.awk b/include/Utils.awk
index 7d0c3f3f..7f8a28ec 100644
--- a/include/Utils.awk
+++ b/include/Utils.awk
@@ -152,6 +152,33 @@ function emacsMe(    i, params, el, command) {
     }
 }
 
+# Fetch the content of a URL via curl with full header support (proxy, cookie,
+# user-agent). Intended for HTTPS requests where gawk /inet/tcp lacks TLS.
+# Returns a null string if curl is unavailable or response is empty.
+function curlGetResponse(url,    command, content, line) {
+    initCurl()
+
+    if (!Curl) {
+        l(">> not found: curl")
+        w("[WARNING] curl is not found.")
+        return NULLSTR
+    }
+
+    command = Curl " --location --silent"
+    if (Option["proxy"])
+        command = command " --proxy " parameterize(Option["proxy"])
+    if (Option["user-agent"])
+        command = command " --user-agent " parameterize(Option["user-agent"])
+    if (Cookie)
+        command = command " --cookie " parameterize(Cookie)
+    command = command " " parameterize(url)
+    content = NULLSTR
+    while ((command |& getline line) > 0)
+        content = (content ? content "\n" : NULLSTR) line
+    close(command)
+    return content
+}
+
 # Fetch the content of a URL. Return a null string if failed.
 function curl(url, output,    command, content, line) {
     initCurl()