Guy Rotem wrote a js function to get a tk
token here. I adapted it for Java:
public class Hasher {
public long shiftLeftOrRightThenSumOrXor(long num, String[] opArray) {
long result = num;
int current = 0;
while (current < opArray.length) {
char op1 = opArray[current].charAt(1); // '+' | '-' ~ SUM | XOR
char op2 = opArray[current].charAt(0); // '+' | '^' ~ SLL | SRL
char xd = opArray[current].charAt(2); // [0-9a-f]
assertError(op1 == '+'
|| op1 == '-', "Invalid OP: " + op1);
assertError(op2 == '+'
|| op2 == '^', "Invalid OP: " + op2);
assertError(('0' <= xd && xd <= '9')
|| ('a' <= xd && xd <='f'), "Not an 0x? value: " + xd);
int shiftAmount = hexCharAsNumber(xd);
int mask = (op1 == '+') ? ((int) result) >>> shiftAmount : ((int) result) << shiftAmount;
long subresult = (op2 == '+') ? (((int) result) + ((int) mask) & 0xffffffff)
: (((int) result) ^ mask);
result = subresult;
current++;
}
return result;
}
public void assertError(boolean cond, String e) {
if (!cond) {
System.err.println();
}
}
public int hexCharAsNumber(char xd) {
return (xd >= 'a') ? xd - 87 : Character.getNumericValue(xd);
}
public int[] transformQuery(String query) {
int[] e = new int[1000];
int resultSize = 1000;
for (int f = 0, g = 0; g < query.length(); g++) {
int l = query.charAt(g);
if (l < 128) {
e[f++] = l; // 0{l[6-0]}
} else if (l < 2048) {
e[f++] = l >> 6 | 0xC0; // 110{l[10-6]}
e[f++] = l & 0x3F | 0x80; // 10{l[5-0]}
} else if (0xD800 == (l & 0xFC00) &&
g + 1 < query.length() && 0xDC00 == (query.charAt(g + 1) & 0xFC00)) {
// that's pretty rare... (avoid ovf?)
l = (1 << 16) + ((l & 0x03FF) << 10) + (query.charAt(++g) & 0x03FF);
e[f++] = l >> 18 | 0xF0; // 111100{l[9-8*]}
e[f++] = l >> 12 & 0x3F | 0x80; // 10{l[7*-2]}
e[f++] = l & 0x3F | 0x80; // 10{(l+1)[5-0]}
} else {
e[f++] = l >> 12 | 0xE0; // 1110{l[15-12]}
e[f++] = l >> 6 & 0x3F | 0x80; // 10{l[11-6]}
e[f++] = l & 0x3F | 0x80; // 10{l[5-0]}
}
resultSize = f;
}
return Arrays.copyOf(e, resultSize);
}
public long normalizeHash(long encondindRound2) {
if (encondindRound2 < 0) {
encondindRound2 = (encondindRound2 & 0x7fffffff) + 0x80000000L;
}
return (encondindRound2) % 1_000_000;
}
/*
/ EXAMPLE:
/
/ INPUT: query: 'hola', windowTkk: '409837.2120040981'
/ OUTPUT: '70528.480109'
/
*/
public String calcHash(String query, String windowTkk) {
// STEP 1: spread the the query char codes on a byte-array, 1-3 bytes per char
int[] bytesArray = transformQuery(query);
// STEP 2: starting with TKK index,
// add the array from last step one-by-one, and do 2 rounds of shift+add/xor
String[] d = windowTkk.split("\\.");
int tkkIndex = 0;
try {
tkkIndex = Integer.valueOf(d[0]);
}
catch (Exception e) {
e.printStackTrace();
}
long tkkKey = 0;
try {
tkkKey = Long.valueOf(d[1]);
}
catch (Exception e) {
e.printStackTrace();
}
int current = 0;
long result = tkkIndex;
while (current < bytesArray.length) {
result += bytesArray[current];
long subresult = shiftLeftOrRightThenSumOrXor(result,
new String[] {"+-a", "^+6"});
result = subresult;
current++;
}
long encondingRound1 = result;
//System.out.println("encodingRound1: " + encondingRound1);
// STEP 3: apply 3 rounds of shift+add/xor and XOR with they TKK key
long encondingRound2 = ((int) shiftLeftOrRightThenSumOrXor(encondingRound1,
new String[] {"+-3", "^+b", "+-f"})) ^ ((int) tkkKey);
//System.out.println("encodingRound2: " + encondingRound2);
// STEP 4: Normalize to 2s complement & format
long normalizedResult = normalizeHash(encondingRound2);
//System.out.println("normalizedResult: " + normalizedResult);
return String.valueOf(normalizedResult) + "."
+ (((int) normalizedResult) ^ (tkkIndex));
}
}
Once you have tk
you need to just send a HTTP request like this (using okhttp library for sending requests):
HttpUrl.Builder urlBuilder = HttpUrl.parse("https://translate.google.com/translate_tts").newBuilder();
urlBuilder.addQueryParameter("ie", "UTF-8");
urlBuilder.addQueryParameter("q", foreignWord);
urlBuilder.addQueryParameter("tl", "de");
urlBuilder.addQueryParameter("total", "1");
urlBuilder.addQueryParameter("idx", "0");
urlBuilder.addQueryParameter("textlen",
String.valueOf(foreignWord.length()));
urlBuilder.addQueryParameter("tk", hasher.getTk(foreignWord));
urlBuilder.addQueryParameter("client", "webapp");
urlBuilder.addQueryParameter("prev", "input");
String url = urlBuilder.build().toString();
Request request = new Request.Builder()
.url(url)
.addHeader("User-Agent", "Mozilla/5.0...")
.addHeader("Accept-Language", Locale.US.getLanguage())
.addHeader("Referer", "https://translate.google.com/")
.get()
.build();
OkHttpClient client = new OkHttpClient();
Call call = client.newCall(request);
Response response = call.execute();
InputStream inputStream = response.body().byteStream();
FileOutputStream fileOutputStream = new FileOutputStream(path + "/audio/" + foreignWord + ".mpga");
byte dataBuffer[] = new byte[1024];
int bytesRead;
while ((bytesRead = inputStream.read(dataBuffer, 0, 1024)) != -1) {
fileOutputStream.write(dataBuffer, 0, bytesRead);
}
It saves the file as .mpga
, because that's what google returns. You can then use some other libraries to convert .mpga
to .mp3
.