Add support for Content-Transfer-Encoding=quoted-printable

mjarkk · Jul 28, 2024 · 5c0bb73 · 5c0bb73
1 parent bc73cfa
commit 5c0bb73
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Showing 10 changed files with 85 additions and 7 deletions.
diff --git a/dist/assets/Code-DbhFbLet.js → dist/assets/Code-1S_lVFgV.js b/dist/assets/Code-DbhFbLet.js → dist/assets/Code-1S_lVFgV.js
diff --git a/dist/assets/Code-DV6HP0dz.css → dist/assets/Code-1ehz9Hc3.css b/dist/assets/Code-DV6HP0dz.css → dist/assets/Code-1ehz9Hc3.css
diff --git a/dist/assets/Show-DNYecVsq.js b/dist/assets/Show-DNYecVsq.js
diff --git a/dist/assets/Show-pm1-B8_e.js b/dist/assets/Show-pm1-B8_e.js
diff --git a/dist/assets/index-DM5YycMT.js b/dist/assets/index-DM5YycMT.js
diff --git a/dist/assets/index-CygxqtQR.css → dist/assets/index-WeMh_2BT.css b/dist/assets/index-CygxqtQR.css → dist/assets/index-WeMh_2BT.css
diff --git a/dist/assets/index-brl1C-fK.js b/dist/assets/index-brl1C-fK.js
diff --git a/dist/index.html b/dist/index.html
@@ -14,8 +14,8 @@
 				color: white;
 			}
 		</style>
-		<script type="module" crossorigin src="/assets/index-DM5YycMT.js"></script>
-		<link rel="stylesheet" crossorigin href="/assets/index-CygxqtQR.css">
+		<script type="module" crossorigin src="/assets/index-brl1C-fK.js"></script>
+		<link rel="stylesheet" crossorigin href="/assets/index-WeMh_2BT.css">
 	</head>
 	<body>
 		<div id="root"></div>

diff --git a/go/email.go b/go/email.go
@@ -144,6 +144,10 @@ func ConvertEmail(ulid ulid.ULID, emlRawData []byte, em parsemail.Email, realDat
 		bodyHint = bodyHint[:100] + "..."
 	}
 
+	if em.Header.Get("Content-Transfer-Encoding") == "quoted-printable" {
+		em.HTMLBody = sanitize.ConvertQoutedPrintable(em.HTMLBody)
+	}
+
 	htmlBody, err := sanitize.Parse(em.HTMLBody)
 	if err != nil {
 		return Email{}, err

diff --git a/go/sanitize/quoted_printable.go b/go/sanitize/quoted_printable.go
@@ -0,0 +1,63 @@
+package sanitize
+
+import (
+	"encoding/hex"
+	"fmt"
+)
+
+func isHexUpper(c byte) bool {
+	return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F')
+}
+
+func ConvertQoutedPrintable(s string) string {
+	idx := 0
+	resp := []byte{}
+	var err error
+	hexInput := []byte{0, 0}
+
+	for {
+		if idx >= len(s) {
+			break
+		}
+
+		c := s[idx]
+		if c != '=' {
+			resp = append(resp, c)
+			idx++
+			continue
+		}
+
+		if idx+2 >= len(s) {
+			resp = append(resp, c)
+			idx++
+			continue
+		}
+
+		hexInput[0] = s[idx+1]
+		hexInput[1] = s[idx+2]
+
+		if hexInput[0] == '\r' && hexInput[1] == '\n' {
+			idx += 3
+			continue
+		}
+
+		if !isHexUpper(hexInput[0]) || !isHexUpper(hexInput[1]) {
+			resp = append(resp, c)
+			idx++
+			continue
+		}
+
+		resp, err = hex.AppendDecode(resp, hexInput)
+		if err != nil {
+			fmt.Printf("DECODEING ERROR, Failed to decode %s to a byte: %s", string(hexInput), err)
+			resp = append(resp, c)
+			idx++
+			continue
+		}
+
+		idx += 3
+		continue
+	}
+
+	return string(resp)
+}