Implement NetworkManager

For now there are two methods: - `NETWORK:IsUrlAllowed()`: Check whether access to a certain URL is allowed. - `NETWORK:HttpRequest()`: Perform an HTTP request. By default access to the network is disabled for all target hosts. It can be enabled by setting `HttpEnable=1` in the preferences. Individual hosts have to be added to `HttpAllowHosts` as a comma separated list to allow access. See included docs for more details on usage.
2022-01-15 22:56:08 +01:00
parent ddfc49e0b5
commit dc49af3c59
265 changed files with 61571 additions and 0 deletions
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+/*
+ *  IXWebSocketHttpHeaders.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2018 Machine Zone, Inc. All rights reserved.
+ */
+
+#include "IXWebSocketHttpHeaders.h"
+
+#include "IXSocket.h"
+#include <algorithm>
+#include <locale>
+
+namespace ix
+{
+    std::pair<bool, WebSocketHttpHeaders> parseHttpHeaders(
+        std::unique_ptr<Socket>& socket, const CancellationRequest& isCancellationRequested)
+    {
+        WebSocketHttpHeaders headers;
+
+        char line[1024];
+        int i;
+
+        while (true)
+        {
+            int colon = 0;
+
+            for (i = 0; i < 2 || (i < 1023 && line[i - 2] != '\r' && line[i - 1] != '\n'); ++i)
+            {
+                if (!socket->readByte(line + i, isCancellationRequested))
+                {
+                    return std::make_pair(false, headers);
+                }
+
+                if (line[i] == ':' && colon == 0)
+                {
+                    colon = i;
+                }
+            }
+            if (line[0] == '\r' && line[1] == '\n')
+            {
+                break;
+            }
+
+            // line is a single header entry. split by ':', and add it to our
+            // header map. ignore lines with no colon.
+            if (colon > 0)
+            {
+                line[i] = '\0';
+                std::string lineStr(line);
+                // colon is ':', usually colon+1 is ' ', and colon+2 is the start of the value.
+                // some webservers do not put a space after the colon character, so
+                // the start of the value might be farther than colon+2.
+                // The spec says that space after the : should be discarded.
+                // i is end of string (\0), i-colon is length of string minus key;
+                // subtract 1 for '\0', 1 for '\n', 1 for '\r',
+                // 1 for the ' ' after the ':', and total is -4
+                // since we use an std::string later on and don't account for '\0',
+                // plus the optional first space, total is -2
+                int start = colon + 1;
+                while (lineStr[start] == ' ')
+                {
+                    start++;
+                }
+
+                std::string name(lineStr.substr(0, colon));
+                std::string value(lineStr.substr(start, lineStr.size() - start - 2));
+
+                headers[name] = value;
+            }
+        }
+
+        return std::make_pair(true, headers);
+    }
+} // namespace ix