Add a function in NetworkCommon parseHeaderList which parses a header list as a string into a vector of header pairs (#2623)

src/common/NetworkCommon.cpp

@@ -0,0 +1,35 @@
+#include "common/NetworkCommon.hpp"
+
+#include <QStringList>
+
+namespace chatterino {
+
+std::vector<std::pair<QByteArray, QByteArray>> parseHeaderList(
+    const QString &headerListString)
+{
+    std::vector<std::pair<QByteArray, QByteArray>> res;
+
+    // Split the string into a list of header pairs
+    // e.g. "Authorization:secretkey;NextHeader:boo" turning into ["Authorization:secretkey","NextHeader:boo"]
+    auto headerPairs = headerListString.split(";");
+
+    for (const auto &headerPair : headerPairs)
+    {
+        const auto headerName =
+            headerPair.section(":", 0, 0).trimmed().toUtf8();
+        const auto headerValue = headerPair.section(":", 1).trimmed().toUtf8();
+
+        if (headerName.isEmpty() || headerValue.isEmpty())
+        {
+            // The header part either didn't contain a : or the name/value was empty
+            // Skip the value
+            continue;
+        }
+
+        res.emplace_back(headerName, headerValue);
+    }
+
+    return res;
+}
+
+}  // namespace chatterino