tracts the query string from an <code>MgHttpMessage</code> as a Julia <code>String</code>.</p><p><strong>Arguments</strong></p><ul><li><code>message::MgHttpMessage</code>: The HTTP message object.</li></ul><p><strong>Returns</strong></p><p><code>String</code>: The query string (e.g., &quot;param=value&amp;id=1&quot;).</p></div><a class="docs-sourcelink" target="_blank" href="https://github.com/AbrJA/Mongoose.jl/blob/1e08c14e543dc2eacb8e6003e147ceba8962fe86/src/Mongoose.jl#L164-L174">source</a></section></ar