61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#pragma once
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#include "util.h"
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#include <winhttp.h>
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using InternetHandle = AutoHandle<Functor<WinHttpCloseHandle>>;
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inline std::optional<std::wstring> ReceiveHttpRequest(HINTERNET request)
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{
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WinHttpReceiveResponse(request, NULL);
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std::string data;
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DWORD dwSize, dwDownloaded;
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do
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{
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dwSize = 0;
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WinHttpQueryDataAvailable(request, &dwSize);
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if (!dwSize) break;
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std::vector<char> buffer(dwSize);
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WinHttpReadData(request, buffer.data(), dwSize, &dwDownloaded);
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data.append(buffer.data(), dwDownloaded);
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} while (dwSize > 0);
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if (data.empty()) return {};
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return StringToWideString(data);
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}
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inline void Unescape(std::wstring& text)
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{
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for (int i = 0; i < text.size(); ++i)
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{
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if (text[i] == L'\\')
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{
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text[i] = 0x200b;
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if (text[i + 1] == L'r') text[i + 1] = 0x200b; // for some reason \r gets displayed as a newline
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if (text[i + 1] == L'n') text[i + 1] = L'\n';
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if (text[i + 1] == L't') text[i + 1] = L'\t';
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}
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}
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}
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class RateLimiter
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{
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public:
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RateLimiter(int tokenCount, int delay) : tokenCount(tokenCount), delay(delay) {}
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bool Request()
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{
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auto tokens = this->tokens.Acquire();
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tokens->push_back(GetTickCount());
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if (tokens->size() > tokenCount * 5) tokens->erase(tokens->begin(), tokens->begin() + tokenCount * 3);
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tokens->erase(std::remove_if(tokens->begin(), tokens->end(), [this](DWORD token) { return GetTickCount() - token > delay; }), tokens->end());
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return tokens->size() < tokenCount;
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}
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const int tokenCount, delay;
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private:
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Synchronized<std::vector<DWORD>> tokens;
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};
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