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7670 - Fixed Windows chromium-args 260 character limit #7671

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7670 - Fixed Windows chromium-args 260 character limit #7671

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29 changes: 22 additions & 7 deletions src/nw_package.cc
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Expand Up @@ -471,15 +471,30 @@ void Package::ReadChromiumArgs() {
// Expand Windows psudovars (ex; %APPDATA%) passed in chromium-args in the same way as when
// passed as command line parameters.
#if defined(OS_WIN)
TCHAR szEnvPath[MAX_PATH];
std::wstring ws;
ws.assign( args.begin(), args.end());
if (ExpandEnvironmentStrings(ws.c_str(), szEnvPath,MAX_PATH) != 0) {
std::wstring ws_out = szEnvPath;
args = std::string(ws_out.begin(), ws_out.end());
} else {
ReportError("Failed to expand chromium args",args.c_str());
ws.assign(args.begin(), args.end());
DWORD szEnvPathSize = ws.size();
if (szEnvPathSize > 32000) {
// ExpandEnvironmentStrings is limited to a string length of 32,000. This is unlikely to happen for chromium-args, but it could be an issue, so tell the user.
ReportError("ExpandEnvironmentStrings does not support strings over 32,000 characters for chromium-args on Windows. Open an issue if you require this.", args.c_str());
}
DWORD szEnvPathNewSize;
do {
TCHAR szEnvPath[szEnvPathSize];
szEnvPathNewSize = ExpandEnvironmentStrings(ws.c_str(), szEnvPath, szEnvPathSize);
if (szEnvPathNewSize == 0) {
ReportError("Failed to execute ExpandEnvironmentStrings on chromium-args", args.c_str());
break;
} else if (szEnvPathNewSize <= szEnvPathSize) {
// ExpandEnvironmentStrings ran without error and szEnvPath was large enough to hold the result
std::wstring ws_out = szEnvPath;
args = std::string(ws_out.begin(), ws_out.end());
break;
} else {
// Resize szEnvPath to be the size of szEnvPathNewSize
szEnvPathSize = szEnvPathNewSize;
}
} while (true);
#endif
args = env_args + kChromiumArgsSeparator + args;

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