UA String failed,prompt Invalid Device type

Question

We set it "TPV_linux", but we found UA String failed.

We checked the underscore "" and found that it was half-width "" rather than full-size "＿", so it should not fail.

We do not understand what caused this, can you help to check?

Answer 1

Underscore and some other characters are replaced in function Sanitize() when the User Agent string is created in UserAgentStringFactory::CreateUserAgentString().

Please, check file cobalt/network/user_agent_string_factory.cc for more details, but comments in the source code suggest that these chars are reserved:

struct SanitizeReplacements {
  const char* replace_chars;
  const char* replace_with;
} kSanitizeReplacements[] = {
  { ",", u8"\uFF0C" },  // fullwidth comma
  { "_", u8"\u2E0F" },  // paragraphos
  { "/", u8"\u2215" },  // division slash
  { "(", u8"\uFF08" },  // fullwidth left paren
  { ")", u8"\uFF09" },  // fullwidth right paren
};