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Bangle.js ensure we don't try and use base64 to encode something that is actually UTF8

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This commit is contained in:
Gordon Williams 2024-03-19 13:36:42 +00:00
parent fa59dfe72e
commit d3c16a1d40
1 changed files with 5 additions and 3 deletions
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8
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/banglejs/BangleJSDeviceSupport.java
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@ -382,11 +382,13 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
/* Convert a string, escaping chars we can't send over out UART connection */
String s = (String)v;
StringBuilder json = new StringBuilder("\"");
boolean hasUnicode = false;
//String rawString = "";
for (int i=0;i<s.length();i++) {
int ch = (int)s.charAt(i); // 0..255
int nextCh = (int)(i+1<s.length() ? s.charAt(i+1) : 0); // 0..255
int ch = (int)s.charAt(i); // unicode, so 0..65535 (usually)
int nextCh = (int)(i+1<s.length() ? s.charAt(i+1) : 0); // 0..65535
//rawString = rawString+ch+",";
if (ch>255) hasUnicode = true;
if (ch<8) {
// if the next character is a digit, it'd be interpreted
// as a 2 digit octal character, so we can't use `\0` to escape it
@ -407,7 +409,7 @@ public class BangleJSDeviceSupport extends AbstractBTLEDeviceSupport {
else json.append(s.charAt(i));
}
// if it was less characters to send base64, do that!
if (json.length() > 5+(s.length()*4/3)) {
if (!hasUnicode && (json.length() > 5+(s.length()*4/3))) {
byte[] bytes = s.getBytes(StandardCharsets.ISO_8859_1);
return "atob(\""+Base64.encodeToString(bytes, Base64.DEFAULT).replaceAll("\n","")+"\")";
}