Begin work on proxy server

Create a simple server with 3 endpoints:
* /create_session: Create a session and return its identifier.
* /set_transcript: Update a session's transcript.
* /get_transcript: Fetch a session's transcript.

Right now the session ID provides authentication *and* authorization.
There is no public/private ID so you have to trust whoever you share
your ID with.

IDs are long and generated by the server, so it should be somewhat
secure against low-effort hacking.

Other updates:
* Drop whisper_requirements.txt - no longer needed.
* Vendor curl to make it easier to interact with the server.

TODO:
* Fuzz test the server.

1 files changed, 32 insertions, 0 deletions

diff --git a/BrowserSource/Proxy/ScopeGuard.h b/BrowserSource/Proxy/ScopeGuard.h
new file mode 100644
index 0000000..61bb64d
--- /dev/null
+++ b/BrowserSource/Proxy/ScopeGuard.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <functional>
+#include <utility>
+
+class ScopeGuard {
+public:
+	ScopeGuard(std::function<void()>&& cb) : cb_(std::move(cb)), active_(true) {}
+	~ScopeGuard() {
+		Invoke();
+	}
+
+	ScopeGuard() = delete;
+	ScopeGuard(ScopeGuard&) = delete;
+	ScopeGuard(const ScopeGuard&) = delete;
+	ScopeGuard(ScopeGuard&&) = delete;
+	ScopeGuard& operator=(ScopeGuard&) = delete;
+	ScopeGuard& operator=(const ScopeGuard&) = delete;
+
+	void Cancel() { active_ = false; }
+
+	void Invoke() {
+		if (active_) {
+			cb_();
+			active_ = false;
+		}
+	}
+
+private:
+	const std::function<void()> cb_;
+	bool active_;
+};