<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/batch.rs`."><title>batch.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-46132b98.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="scrapfly_sdk" data-themes="" data-resource-suffix="" data-rustdoc-version="1.85.0 (4d91de4e4 2025-02-17)" data-channel="1.85.0" data-search-js="search-75f5ac3e.js" data-settings-js="settings-0f613d39.js" ><script src="../../static.files/storage-59e33391.js"></script><script defer src="../../static.files/src-script-56102188.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-5f194d8c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-893ab5e7.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-6580c154.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer"></div><main><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">scrapfly_sdk/</div>batch.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers">
<a href="#1" id="1">1</a>
<a href="#2" id="2">2</a>
<a href="#3" id="3">3</a>
<a href="#4" id="4">4</a>
<a href="#5" id="5">5</a>
<a href="#6" id="6">6</a>
<a href="#7" id="7">7</a>
<a href="#8" id="8">8</a>
<a href="#9" id="9">9</a>
<a href="#10" id="10">10</a>
<a href="#11" id="11">11</a>
<a href="#12" id="12">12</a>
<a href="#13" id="13">13</a>
<a href="#14" id="14">14</a>
<a href="#15" id="15">15</a>
<a href="#16" id="16">16</a>
<a href="#17" id="17">17</a>
<a href="#18" id="18">18</a>
<a href="#19" id="19">19</a>
<a href="#20" id="20">20</a>
<a href="#21" id="21">21</a>
<a href="#22" id="22">22</a>
<a href="#23" id="23">23</a>
<a href="#24" id="24">24</a>
<a href="#25" id="25">25</a>
<a href="#26" id="26">26</a>
<a href="#27" id="27">27</a>
<a href="#28" id="28">28</a>
<a href="#29" id="29">29</a>
<a href="#30" id="30">30</a>
<a href="#31" id="31">31</a>
<a href="#32" id="32">32</a>
<a href="#33" id="33">33</a>
<a href="#34" id="34">34</a>
<a href="#35" id="35">35</a>
<a href="#36" id="36">36</a>
<a href="#37" id="37">37</a>
<a href="#38" id="38">38</a>
<a href="#39" id="39">39</a>
<a href="#40" id="40">40</a>
<a href="#41" id="41">41</a>
<a href="#42" id="42">42</a>
<a href="#43" id="43">43</a>
<a href="#44" id="44">44</a>
<a href="#45" id="45">45</a>
<a href="#46" id="46">46</a>
<a href="#47" id="47">47</a>
<a href="#48" id="48">48</a>
<a href="#49" id="49">49</a>
<a href="#50" id="50">50</a>
<a href="#51" id="51">51</a>
<a href="#52" id="52">52</a>
<a href="#53" id="53">53</a>
<a href="#54" id="54">54</a>
<a href="#55" id="55">55</a>
<a href="#56" id="56">56</a>
<a href="#57" id="57">57</a>
<a href="#58" id="58">58</a>
<a href="#59" id="59">59</a>
<a href="#60" id="60">60</a>
<a href="#61" id="61">61</a>
<a href="#62" id="62">62</a>
<a href="#63" id="63">63</a>
<a href="#64" id="64">64</a>
<a href="#65" id="65">65</a>
<a href="#66" id="66">66</a>
<a href="#67" id="67">67</a>
<a href="#68" id="68">68</a>
<a href="#69" id="69">69</a>
<a href="#70" id="70">70</a>
<a href="#71" id="71">71</a>
<a href="#72" id="72">72</a>
<a href="#73" id="73">73</a>
<a href="#74" id="74">74</a>
<a href="#75" id="75">75</a>
<a href="#76" id="76">76</a>
<a href="#77" id="77">77</a>
<a href="#78" id="78">78</a>
<a href="#79" id="79">79</a>
<a href="#80" id="80">80</a>
<a href="#81" id="81">81</a>
<a href="#82" id="82">82</a>
<a href="#83" id="83">83</a>
<a href="#84" id="84">84</a>
<a href="#85" id="85">85</a>
<a href="#86" id="86">86</a>
<a href="#87" id="87">87</a>
<a href="#88" id="88">88</a>
<a href="#89" id="89">89</a>
<a href="#90" id="90">90</a>
<a href="#91" id="91">91</a>
<a href="#92" id="92">92</a>
<a href="#93" id="93">93</a>
<a href="#94" id="94">94</a>
<a href="#95" id="95">95</a>
<a href="#96" id="96">96</a>
<a href="#97" id="97">97</a>
<a href="#98" id="98">98</a>
<a href="#99" id="99">99</a>
<a href="#100" id="100">100</a>
<a href="#101" id="101">101</a>
<a href="#102" id="102">102</a>
<a href="#103" id="103">103</a>
<a href="#104" id="104">104</a>
<a href="#105" id="105">105</a>
<a href="#106" id="106">106</a>
<a href="#107" id="107">107</a>
<a href="#108" id="108">108</a>
<a href="#109" id="109">109</a>
<a href="#110" id="110">110</a>
<a href="#111" id="111">111</a>
<a href="#112" id="112">112</a>
<a href="#113" id="113">113</a>
<a href="#114" id="114">114</a>
<a href="#115" id="115">115</a>
<a href="#116" id="116">116</a>
<a href="#117" id="117">117</a>
<a href="#118" id="118">118</a>
<a href="#119" id="119">119</a>
<a href="#120" id="120">120</a>
<a href="#121" id="121">121</a>
<a href="#122" id="122">122</a>
<a href="#123" id="123">123</a>
<a href="#124" id="124">124</a>
<a href="#125" id="125">125</a>
<a href="#126" id="126">126</a>
<a href="#127" id="127">127</a>
<a href="#128" id="128">128</a>
<a href="#129" id="129">129</a>
<a href="#130" id="130">130</a>
<a href="#131" id="131">131</a>
<a href="#132" id="132">132</a>
<a href="#133" id="133">133</a>
<a href="#134" id="134">134</a>
<a href="#135" id="135">135</a>
<a href="#136" id="136">136</a>
<a href="#137" id="137">137</a>
<a href="#138" id="138">138</a>
<a href="#139" id="139">139</a>
<a href="#140" id="140">140</a>
<a href="#141" id="141">141</a>
<a href="#142" id="142">142</a>
<a href="#143" id="143">143</a>
<a href="#144" id="144">144</a>
<a href="#145" id="145">145</a>
<a href="#146" id="146">146</a>
<a href="#147" id="147">147</a>
<a href="#148" id="148">148</a>
<a href="#149" id="149">149</a>
<a href="#150" id="150">150</a>
<a href="#151" id="151">151</a>
<a href="#152" id="152">152</a>
<a href="#153" id="153">153</a>
<a href="#154" id="154">154</a>
<a href="#155" id="155">155</a>
<a href="#156" id="156">156</a>
<a href="#157" id="157">157</a>
<a href="#158" id="158">158</a>
<a href="#159" id="159">159</a>
<a href="#160" id="160">160</a>
<a href="#161" id="161">161</a>
<a href="#162" id="162">162</a>
<a href="#163" id="163">163</a>
<a href="#164" id="164">164</a>
<a href="#165" id="165">165</a>
<a href="#166" id="166">166</a>
<a href="#167" id="167">167</a>
<a href="#168" id="168">168</a>
<a href="#169" id="169">169</a>
<a href="#170" id="170">170</a>
<a href="#171" id="171">171</a>
<a href="#172" id="172">172</a>
<a href="#173" id="173">173</a>
<a href="#174" id="174">174</a>
<a href="#175" id="175">175</a>
<a href="#176" id="176">176</a>
<a href="#177" id="177">177</a>
<a href="#178" id="178">178</a>
<a href="#179" id="179">179</a>
<a href="#180" id="180">180</a>
<a href="#181" id="181">181</a>
<a href="#182" id="182">182</a>
<a href="#183" id="183">183</a>
<a href="#184" id="184">184</a>
<a href="#185" id="185">185</a>
<a href="#186" id="186">186</a>
<a href="#187" id="187">187</a>
<a href="#188" id="188">188</a>
<a href="#189" id="189">189</a>
<a href="#190" id="190">190</a>
<a href="#191" id="191">191</a>
<a href="#192" id="192">192</a>
<a href="#193" id="193">193</a>
<a href="#194" id="194">194</a>
<a href="#195" id="195">195</a>
<a href="#196" id="196">196</a>
<a href="#197" id="197">197</a>
<a href="#198" id="198">198</a>
<a href="#199" id="199">199</a>
<a href="#200" id="200">200</a>
<a href="#201" id="201">201</a>
<a href="#202" id="202">202</a>
<a href="#203" id="203">203</a>
<a href="#204" id="204">204</a>
<a href="#205" id="205">205</a>
<a href="#206" id="206">206</a>
<a href="#207" id="207">207</a>
<a href="#208" id="208">208</a>
<a href="#209" id="209">209</a>
<a href="#210" id="210">210</a>
<a href="#211" id="211">211</a>
<a href="#212" id="212">212</a>
<a href="#213" id="213">213</a>
<a href="#214" id="214">214</a>
<a href="#215" id="215">215</a>
<a href="#216" id="216">216</a>
<a href="#217" id="217">217</a>
<a href="#218" id="218">218</a>
<a href="#219" id="219">219</a>
<a href="#220" id="220">220</a>
<a href="#221" id="221">221</a>
<a href="#222" id="222">222</a>
<a href="#223" id="223">223</a>
<a href="#224" id="224">224</a>
<a href="#225" id="225">225</a>
<a href="#226" id="226">226</a>
<a href="#227" id="227">227</a>
<a href="#228" id="228">228</a>
<a href="#229" id="229">229</a>
<a href="#230" id="230">230</a>
<a href="#231" id="231">231</a>
<a href="#232" id="232">232</a>
<a href="#233" id="233">233</a>
<a href="#234" id="234">234</a>
<a href="#235" id="235">235</a>
<a href="#236" id="236">236</a>
<a href="#237" id="237">237</a>
<a href="#238" id="238">238</a>
<a href="#239" id="239">239</a>
<a href="#240" id="240">240</a>
<a href="#241" id="241">241</a>
<a href="#242" id="242">242</a>
<a href="#243" id="243">243</a>
<a href="#244" id="244">244</a>
<a href="#245" id="245">245</a>
<a href="#246" id="246">246</a>
<a href="#247" id="247">247</a>
<a href="#248" id="248">248</a>
<a href="#249" id="249">249</a>
<a href="#250" id="250">250</a>
<a href="#251" id="251">251</a>
<a href="#252" id="252">252</a>
<a href="#253" id="253">253</a>
<a href="#254" id="254">254</a>
<a href="#255" id="255">255</a>
<a href="#256" id="256">256</a>
<a href="#257" id="257">257</a>
<a href="#258" id="258">258</a>
<a href="#259" id="259">259</a>
<a href="#260" id="260">260</a>
<a href="#261" id="261">261</a>
<a href="#262" id="262">262</a>
<a href="#263" id="263">263</a>
<a href="#264" id="264">264</a>
<a href="#265" id="265">265</a>
<a href="#266" id="266">266</a>
<a href="#267" id="267">267</a>
<a href="#268" id="268">268</a>
<a href="#269" id="269">269</a>
<a href="#270" id="270">270</a>
<a href="#271" id="271">271</a>
<a href="#272" id="272">272</a>
<a href="#273" id="273">273</a>
<a href="#274" id="274">274</a>
<a href="#275" id="275">275</a>
<a href="#276" id="276">276</a>
<a href="#277" id="277">277</a>
<a href="#278" id="278">278</a>
<a href="#279" id="279">279</a>
<a href="#280" id="280">280</a>
<a href="#281" id="281">281</a>
<a href="#282" id="282">282</a>
<a href="#283" id="283">283</a>
<a href="#284" id="284">284</a>
<a href="#285" id="285">285</a>
<a href="#286" id="286">286</a>
<a href="#287" id="287">287</a>
<a href="#288" id="288">288</a>
<a href="#289" id="289">289</a>
<a href="#290" id="290">290</a>
<a href="#291" id="291">291</a>
<a href="#292" id="292">292</a>
<a href="#293" id="293">293</a>
<a href="#294" id="294">294</a>
<a href="#295" id="295">295</a>
<a href="#296" id="296">296</a>
<a href="#297" id="297">297</a>
<a href="#298" id="298">298</a>
<a href="#299" id="299">299</a>
<a href="#300" id="300">300</a>
<a href="#301" id="301">301</a>
<a href="#302" id="302">302</a>
<a href="#303" id="303">303</a>
<a href="#304" id="304">304</a>
<a href="#305" id="305">305</a>
<a href="#306" id="306">306</a>
<a href="#307" id="307">307</a>
<a href="#308" id="308">308</a>
<a href="#309" id="309">309</a>
<a href="#310" id="310">310</a>
<a href="#311" id="311">311</a>
<a href="#312" id="312">312</a>
<a href="#313" id="313">313</a>
<a href="#314" id="314">314</a>
<a href="#315" id="315">315</a>
<a href="#316" id="316">316</a>
<a href="#317" id="317">317</a>
<a href="#318" id="318">318</a>
<a href="#319" id="319">319</a>
<a href="#320" id="320">320</a>
<a href="#321" id="321">321</a>
<a href="#322" id="322">322</a>
<a href="#323" id="323">323</a>
<a href="#324" id="324">324</a>
<a href="#325" id="325">325</a>
<a href="#326" id="326">326</a>
<a href="#327" id="327">327</a>
<a href="#328" id="328">328</a>
<a href="#329" id="329">329</a>
<a href="#330" id="330">330</a>
<a href="#331" id="331">331</a>
<a href="#332" id="332">332</a>
<a href="#333" id="333">333</a>
<a href="#334" id="334">334</a>
<a href="#335" id="335">335</a>
<a href="#336" id="336">336</a>
<a href="#337" id="337">337</a>
<a href="#338" id="338">338</a>
<a href="#339" id="339">339</a>
<a href="#340" id="340">340</a>
<a href="#341" id="341">341</a>
<a href="#342" id="342">342</a>
<a href="#343" id="343">343</a>
<a href="#344" id="344">344</a>
<a href="#345" id="345">345</a>
<a href="#346" id="346">346</a>
<a href="#347" id="347">347</a>
<a href="#348" id="348">348</a>
<a href="#349" id="349">349</a>
<a href="#350" id="350">350</a>
<a href="#351" id="351">351</a>
<a href="#352" id="352">352</a>
<a href="#353" id="353">353</a>
<a href="#354" id="354">354</a>
<a href="#355" id="355">355</a>
<a href="#356" id="356">356</a>
<a href="#357" id="357">357</a>
<a href="#358" id="358">358</a>
<a href="#359" id="359">359</a>
<a href="#360" id="360">360</a>
<a href="#361" id="361">361</a>
<a href="#362" id="362">362</a>
<a href="#363" id="363">363</a>
<a href="#364" id="364">364</a>
<a href="#365" id="365">365</a>
<a href="#366" id="366">366</a>
<a href="#367" id="367">367</a>
<a href="#368" id="368">368</a>
<a href="#369" id="369">369</a>
<a href="#370" id="370">370</a>
<a href="#371" id="371">371</a>
<a href="#372" id="372">372</a>
<a href="#373" id="373">373</a>
<a href="#374" id="374">374</a>
<a href="#375" id="375">375</a>
<a href="#376" id="376">376</a>
<a href="#377" id="377">377</a>
<a href="#378" id="378">378</a>
<a href="#379" id="379">379</a>
<a href="#380" id="380">380</a>
<a href="#381" id="381">381</a>
<a href="#382" id="382">382</a>
<a href="#383" id="383">383</a>
<a href="#384" id="384">384</a>
<a href="#385" id="385">385</a>
<a href="#386" id="386">386</a>
<a href="#387" id="387">387</a>
<a href="#388" id="388">388</a>
<a href="#389" id="389">389</a>
<a href="#390" id="390">390</a>
<a href="#391" id="391">391</a>
<a href="#392" id="392">392</a>
<a href="#393" id="393">393</a>
<a href="#394" id="394">394</a>
<a href="#395" id="395">395</a>
<a href="#396" id="396">396</a>
<a href="#397" id="397">397</a>
<a href="#398" id="398">398</a>
<a href="#399" id="399">399</a>
<a href="#400" id="400">400</a>
<a href="#401" id="401">401</a>
<a href="#402" id="402">402</a>
<a href="#403" id="403">403</a>
<a href="#404" id="404">404</a>
<a href="#405" id="405">405</a>
<a href="#406" id="406">406</a>
<a href="#407" id="407">407</a>
<a href="#408" id="408">408</a>
<a href="#409" id="409">409</a>
<a href="#410" id="410">410</a>
<a href="#411" id="411">411</a>
<a href="#412" id="412">412</a>
<a href="#413" id="413">413</a>
<a href="#414" id="414">414</a>
<a href="#415" id="415">415</a>
<a href="#416" id="416">416</a>
<a href="#417" id="417">417</a>
<a href="#418" id="418">418</a>
<a href="#419" id="419">419</a>
<a href="#420" id="420">420</a>
<a href="#421" id="421">421</a>
<a href="#422" id="422">422</a>
<a href="#423" id="423">423</a>
<a href="#424" id="424">424</a>
<a href="#425" id="425">425</a>
<a href="#426" id="426">426</a>
<a href="#427" id="427">427</a>
<a href="#428" id="428">428</a>
<a href="#429" id="429">429</a>
<a href="#430" id="430">430</a>
<a href="#431" id="431">431</a>
<a href="#432" id="432">432</a>
<a href="#433" id="433">433</a>
<a href="#434" id="434">434</a>
<a href="#435" id="435">435</a>
<a href="#436" id="436">436</a>
<a href="#437" id="437">437</a>
<a href="#438" id="438">438</a>
<a href="#439" id="439">439</a>
<a href="#440" id="440">440</a>
<a href="#441" id="441">441</a>
<a href="#442" id="442">442</a>
<a href="#443" id="443">443</a>
<a href="#444" id="444">444</a>
<a href="#445" id="445">445</a>
<a href="#446" id="446">446</a>
<a href="#447" id="447">447</a>
<a href="#448" id="448">448</a>
<a href="#449" id="449">449</a>
<a href="#450" id="450">450</a>
<a href="#451" id="451">451</a>
<a href="#452" id="452">452</a>
<a href="#453" id="453">453</a>
<a href="#454" id="454">454</a>
<a href="#455" id="455">455</a>
<a href="#456" id="456">456</a>
<a href="#457" id="457">457</a>
<a href="#458" id="458">458</a>
<a href="#459" id="459">459</a>
<a href="#460" id="460">460</a>
<a href="#461" id="461">461</a>
<a href="#462" id="462">462</a>
<a href="#463" id="463">463</a>
<a href="#464" id="464">464</a>
<a href="#465" id="465">465</a>
<a href="#466" id="466">466</a>
<a href="#467" id="467">467</a>
<a href="#468" id="468">468</a>
<a href="#469" id="469">469</a>
<a href="#470" id="470">470</a>
<a href="#471" id="471">471</a>
<a href="#472" id="472">472</a>
<a href="#473" id="473">473</a>
<a href="#474" id="474">474</a>
<a href="#475" id="475">475</a>
<a href="#476" id="476">476</a>
<a href="#477" id="477">477</a>
<a href="#478" id="478">478</a>
<a href="#479" id="479">479</a>
<a href="#480" id="480">480</a>
<a href="#481" id="481">481</a>
<a href="#482" id="482">482</a>
<a href="#483" id="483">483</a></pre></div><pre class="rust"><code><span class="doccomment">//! Streaming multipart/mixed parser for POST /scrape/batch.
//!
//! The API emits one part per scrape as each completes. This module
//! reads the response body as a stream of `Bytes` chunks and yields
//! `(headers, body)` per part as they arrive.
//!
//! Zero new dependencies — only `reqwest`, `bytes`, and `futures-util`
//! that are already in `Cargo.toml`.
</span><span class="kw">use </span>std::collections::HashMap;
<span class="kw">use </span>std::pin::Pin;
<span class="kw">use </span>std::task::{Context, Poll};
<span class="kw">use </span>bytes::{Bytes, BytesMut};
<span class="kw">use </span>futures_util::stream::Stream;
<span class="kw">use </span><span class="kw">crate</span>::error::ScrapflyError;
<span class="kw">use </span><span class="kw">crate</span>::result::scrape::ScrapeResult;
<span class="kw">const </span>CRLF: <span class="kw-2">&</span>[u8] = <span class="string">b"\r\n"</span>;
<span class="kw">const </span>DOUBLE_CRLF: <span class="kw-2">&</span>[u8] = <span class="string">b"\r\n\r\n"</span>;
<span class="doccomment">/// One multipart part: header map (lowercased keys) plus body bytes.
</span><span class="attr">#[derive(Debug)]
</span><span class="kw">pub struct </span>BatchPart {
<span class="doccomment">/// Per-part headers, lowercased. `content-type` is always set;
/// `x-scrapfly-correlation-id` and `x-scrapfly-scrape-status`
/// are set by the server.
</span><span class="kw">pub </span>headers: HashMap<String, String>,
<span class="doccomment">/// Part body bytes (not decoded).
</span><span class="kw">pub </span>body: Bytes,
}
<span class="doccomment">/// A proxified batch part surfaced as a native Response-like value.
/// The part body is the raw upstream response (HTML, JSON, binary,
/// etc.) — not a JSON envelope. `reqwest::Response` is tied to a
/// live connection so we cannot re-synthesize one from bytes; this
/// struct carries the same fields a caller needs.
</span><span class="attr">#[derive(Debug)]
</span><span class="kw">pub struct </span>BatchProxifiedResponse {
<span class="doccomment">/// Upstream HTTP status code restored from X-Scrapfly-Scrape-Status.
</span><span class="kw">pub </span>status: u16,
<span class="doccomment">/// Response headers: upstream headers (originally prefixed with
/// X-Scrapfly-Upstream- on the wire, stripped here) PLUS
/// Scrapfly metadata (X-Scrapfly-Log, X-Scrapfly-Content-Format,
/// X-Scrapfly-Log-Uuid). `Content-Type` is the upstream's
/// content-type.
</span><span class="kw">pub </span>headers: HashMap<String, String>,
<span class="doccomment">/// Raw upstream body bytes.
</span><span class="kw">pub </span>body: Bytes,
}
<span class="kw">impl </span>BatchProxifiedResponse {
<span class="doccomment">/// Decode the body as UTF-8 text (mirrors reqwest::Response::text()).
</span><span class="kw">pub fn </span>text(<span class="kw-2">&</span><span class="self">self</span>) -> String {
String::from_utf8_lossy(<span class="kw-2">&</span><span class="self">self</span>.body).into_owned()
}
<span class="doccomment">/// Convenience accessor for the response content-type.
</span><span class="kw">pub fn </span>content_type(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>str> {
<span class="self">self</span>.headers.get(<span class="string">"content-type"</span>).map(String::as_str)
}
<span class="doccomment">/// Scrapfly log UUID (X-Scrapfly-Log if present, else X-Scrapfly-Log-Uuid).
</span><span class="kw">pub fn </span>scrapfly_log(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>str> {
<span class="self">self</span>.headers
.get(<span class="string">"x-scrapfly-log"</span>)
.or_else(|| <span class="self">self</span>.headers.get(<span class="string">"x-scrapfly-log-uuid"</span>))
.map(String::as_str)
}
}
<span class="doccomment">/// Wire format for the per-part body. JSON is the default;
/// Msgpack matches the Scrapfly API's msgpack negotiation.
</span><span class="attr">#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
</span><span class="kw">pub enum </span>BatchFormat {
<span class="doccomment">/// application/json (default).
</span><span class="attr">#[default]
</span>Json,
<span class="doccomment">/// application/msgpack — smaller wire payload.
</span>Msgpack,
}
<span class="kw">impl </span>BatchFormat {
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>accept_header(<span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>str {
<span class="kw">match </span><span class="self">self </span>{
BatchFormat::Json => <span class="string">"application/json"</span>,
BatchFormat::Msgpack => <span class="string">"application/msgpack"</span>,
}
}
}
<span class="doccomment">/// Options for `Client::scrape_batch_with_options`.
</span><span class="attr">#[derive(Debug, Clone, Default)]
</span><span class="kw">pub struct </span>BatchOptions {
<span class="doccomment">/// Wire format for per-part bodies. Defaults to JSON.
</span><span class="kw">pub </span>format: BatchFormat,
}
<span class="doccomment">/// Per-part outcome yielded by `Client::scrape_batch`.
</span><span class="attr">#[derive(Debug)]
</span><span class="kw">pub enum </span>BatchOutcome {
<span class="doccomment">/// Standard per-part scrape result (JSON envelope decoded).
</span>Scrape(ScrapeResult),
<span class="doccomment">/// Proxified part: the upstream's raw response, with status +
/// headers + body restored from the multipart part metadata.
/// Surfaces when the originating `ScrapeConfig.proxified_response
/// == true`. Matches the single-scrape `scrape_proxified()`
/// return shape as closely as we can without a live connection.
</span>Proxified(BatchProxifiedResponse),
<span class="doccomment">/// Per-part error (decode failure, per-scrape upstream error, etc.).
</span><span class="prelude-val">Err</span>(ScrapflyError),
}
<span class="kw">fn </span>find_subslice(buf: <span class="kw-2">&</span>[u8], needle: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><usize> {
<span class="kw">if </span>needle.is_empty() {
<span class="kw">return </span><span class="prelude-val">Some</span>(<span class="number">0</span>);
}
<span class="kw">if </span>buf.len() < needle.len() {
<span class="kw">return </span><span class="prelude-val">None</span>;
}
(<span class="number">0</span>..=buf.len() - needle.len()).find(|<span class="kw-2">&</span>i| <span class="kw-2">&</span>buf[i..i + needle.len()] == needle)
}
<span class="kw">fn </span>parse_content_type(value: <span class="kw-2">&</span>str) -> (String, HashMap<String, String>) {
<span class="kw">if let </span><span class="prelude-val">Some</span>(idx) = value.find(<span class="string">';'</span>) {
<span class="kw">let </span>mime = value[..idx].trim().to_lowercase();
<span class="kw">let </span><span class="kw-2">mut </span>params = HashMap::new();
<span class="kw">for </span>piece <span class="kw">in </span>value[idx + <span class="number">1</span>..].split(<span class="string">';'</span>) {
<span class="kw">if let </span><span class="prelude-val">Some</span>(eq) = piece.find(<span class="string">'='</span>) {
<span class="kw">let </span>k = piece[..eq].trim().to_lowercase();
<span class="kw">let </span><span class="kw-2">mut </span>v = piece[eq + <span class="number">1</span>..].trim().to_string();
<span class="kw">if </span>v.starts_with(<span class="string">'"'</span>) && v.ends_with(<span class="string">'"'</span>) && v.len() >= <span class="number">2 </span>{
v = v[<span class="number">1</span>..v.len() - <span class="number">1</span>].to_string();
}
params.insert(k, v);
}
}
(mime, params)
} <span class="kw">else </span>{
(value.trim().to_lowercase(), HashMap::new())
}
}
<span class="doccomment">/// Stream adapter: wraps a reqwest bytes stream and yields one
/// `BatchPart` per multipart section as the body arrives.
</span><span class="kw">pub struct </span>BatchPartStream<S> {
inner: S,
boundary_line: Vec<u8>,
boundary_sep: Vec<u8>,
buf: BytesMut,
state: State,
done: bool,
}
<span class="kw">enum </span>State {
<span class="doccomment">/// Haven't found the first --boundary yet; discard anything before it.
</span>FindFirstBoundary,
<span class="doccomment">/// Just consumed a --boundary; next is either CRLF or "--" (terminator).
</span>BoundarySuffix,
<span class="doccomment">/// Reading part headers up to CRLF CRLF.
</span>Headers,
<span class="doccomment">/// Reading part body either by Content-Length or up to next boundary.
</span>Body {
headers: HashMap<String, String>,
content_length: <span class="prelude-ty">Option</span><usize>,
},
<span class="doccomment">/// Body already yielded; scan for the trailing "\r\n--<boundary>"
/// and discard it before transitioning to BoundarySuffix. This
/// lets Content-Length framing yield a part the instant its body
/// bytes arrive, without waiting for the next part's boundary.
</span>ConsumeSeparator,
<span class="doccomment">/// Stream is done; no more parts.
</span>Done,
}
<span class="kw">impl</span><S> BatchPartStream<S>
<span class="kw">where
</span>S: Stream<Item = <span class="prelude-ty">Result</span><Bytes, reqwest::Error>> + Unpin,
{
<span class="doccomment">/// Construct a part stream wrapping `stream` with the given
/// `boundary` (without the leading `--`).
</span><span class="kw">pub fn </span>new(stream: S, boundary: <span class="kw-2">&</span>str) -> <span class="self">Self </span>{
<span class="kw">let </span>boundary_line = <span class="macro">format!</span>(<span class="string">"--{}"</span>, boundary).into_bytes();
<span class="kw">let </span>boundary_sep = <span class="macro">format!</span>(<span class="string">"\r\n--{}"</span>, boundary).into_bytes();
<span class="self">Self </span>{
inner: stream,
boundary_line,
boundary_sep,
buf: BytesMut::new(),
state: State::FindFirstBoundary,
done: <span class="bool-val">false</span>,
}
}
}
<span class="kw">impl</span><S> Stream <span class="kw">for </span>BatchPartStream<S>
<span class="kw">where
</span>S: Stream<Item = <span class="prelude-ty">Result</span><Bytes, reqwest::Error>> + Unpin,
{
<span class="kw">type </span>Item = <span class="prelude-ty">Result</span><BatchPart, ScrapflyError>;
<span class="kw">fn </span>poll_next(<span class="kw-2">mut </span><span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="prelude-ty">Option</span><<span class="self">Self</span>::Item>> {
<span class="kw">loop </span>{
<span class="comment">// Run the state machine on the current buffer.
</span><span class="kw">let </span>this = <span class="kw-2">&mut *</span><span class="self">self</span>;
<span class="kw">match </span><span class="kw-2">&mut </span>this.state {
State::Done => <span class="kw">return </span>Poll::Ready(<span class="prelude-val">None</span>),
State::FindFirstBoundary => {
<span class="kw">if let </span><span class="prelude-val">Some</span>(idx) = find_subslice(<span class="kw-2">&</span>this.buf, <span class="kw-2">&</span>this.boundary_line) {
<span class="kw">let _ </span>= this.buf.split_to(idx + this.boundary_line.len());
this.state = State::BoundarySuffix;
<span class="kw">continue</span>;
}
}
State::BoundarySuffix => {
<span class="kw">if </span>this.buf.len() < <span class="number">2 </span>{
<span class="comment">// need more
</span>} <span class="kw">else </span>{
<span class="kw">let </span>head = <span class="kw-2">&</span>this.buf[..<span class="number">2</span>];
<span class="kw">if </span>head == <span class="string">b"--" </span>{
this.state = State::Done;
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">None</span>);
}
<span class="kw">if </span>head == CRLF {
<span class="kw">let _ </span>= this.buf.split_to(<span class="number">2</span>);
this.state = State::Headers;
<span class="kw">continue</span>;
}
<span class="comment">// Tolerate LF-only.
</span><span class="kw">if </span>this.buf[<span class="number">0</span>] == <span class="string">b'\n' </span>{
<span class="kw">let _ </span>= this.buf.split_to(<span class="number">1</span>);
this.state = State::Headers;
<span class="kw">continue</span>;
}
this.state = State::Done;
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">None</span>);
}
}
State::Headers => {
<span class="kw">if let </span><span class="prelude-val">Some</span>(idx) = find_subslice(<span class="kw-2">&</span>this.buf, DOUBLE_CRLF) {
<span class="kw">let </span>header_block = this.buf.split_to(idx).freeze();
<span class="kw">let _ </span>= this.buf.split_to(DOUBLE_CRLF.len());
<span class="kw">let </span><span class="kw-2">mut </span>headers: HashMap<String, String> = HashMap::new();
<span class="kw">let </span>bytes_ref: <span class="kw-2">&</span>[u8] = header_block.as_ref();
<span class="kw">for </span>line <span class="kw">in </span>bytes_ref.split(|b: <span class="kw-2">&</span>u8| <span class="kw-2">*</span>b == <span class="string">b'\n'</span>) {
<span class="kw">let </span>line: <span class="kw-2">&</span>[u8] = <span class="kw">if let </span><span class="prelude-val">Some</span>(l) = line.strip_suffix(<span class="kw-2">&</span>[<span class="string">b'\r'</span>][..]) {
l
} <span class="kw">else </span>{
line
};
<span class="kw">if </span>line.is_empty() {
<span class="kw">continue</span>;
}
<span class="kw">let </span>s = <span class="kw">match </span>std::str::from_utf8(line) {
<span class="prelude-val">Ok</span>(s) => s,
<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="kw">continue</span>,
};
<span class="kw">if let </span><span class="prelude-val">Some</span>(colon) = s.find(<span class="string">':'</span>) {
<span class="kw">let </span>k = s[..colon].trim().to_lowercase();
<span class="kw">let </span>v = s[colon + <span class="number">1</span>..].trim().to_string();
headers.insert(k, v);
}
}
<span class="kw">let </span>content_length = headers
.get(<span class="string">"content-length"</span>)
.and_then(|v| v.parse::<usize>().ok());
this.state = State::Body {
headers,
content_length,
};
<span class="kw">continue</span>;
}
}
State::Body {
headers,
content_length,
} => {
<span class="comment">// With Content-Length, yield the part the instant
// its body bytes arrive. Consuming the trailing
// "\r\n--<boundary>" separator is deferred to the
// next poll via State::ConsumeSeparator — that
// way the caller observes streaming order even
// when the next part is slow to land on the wire.
//
// Without Content-Length we have no choice but to
// scan for the separator (it's how the body ends).
</span><span class="kw">let </span>(body_end, consume_sep_after_yield) = <span class="kw">match </span><span class="kw-2">*</span>content_length {
<span class="prelude-val">Some</span>(cl) <span class="kw">if </span>this.buf.len() >= cl => (<span class="prelude-val">Some</span>(cl), <span class="bool-val">true</span>),
<span class="prelude-val">Some</span>(<span class="kw">_</span>) => (<span class="prelude-val">None</span>, <span class="bool-val">false</span>),
<span class="prelude-val">None </span>=> (find_subslice(<span class="kw-2">&</span>this.buf, <span class="kw-2">&</span>this.boundary_sep), <span class="bool-val">false</span>),
};
<span class="kw">if let </span><span class="prelude-val">Some</span>(end) = body_end {
<span class="kw">let </span>body = this.buf.split_to(end).freeze();
<span class="kw">let </span>part = BatchPart {
headers: std::mem::take(headers),
body,
};
<span class="kw">if </span>consume_sep_after_yield {
this.state = State::ConsumeSeparator;
} <span class="kw">else </span>{
<span class="comment">// Separator was part of the body_end scan;
// drop its bytes and go back to the suffix.
</span><span class="kw">let _ </span>= this.buf.split_to(this.boundary_sep.len());
this.state = State::BoundarySuffix;
}
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(part)));
}
}
State::ConsumeSeparator => {
<span class="kw">if let </span><span class="prelude-val">Some</span>(idx) = find_subslice(<span class="kw-2">&</span>this.buf, <span class="kw-2">&</span>this.boundary_sep) {
<span class="kw">let _ </span>= this.buf.split_to(idx + this.boundary_sep.len());
this.state = State::BoundarySuffix;
<span class="kw">continue</span>;
}
<span class="comment">// Need more bytes; fall through to the pump block.
</span>}
}
<span class="comment">// Need more bytes from the underlying stream.
</span><span class="kw">if </span>this.done {
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">None</span>);
}
<span class="kw">match </span>Pin::new(<span class="kw-2">&mut </span>this.inner).poll_next(cx) {
Poll::Pending => <span class="kw">return </span>Poll::Pending,
Poll::Ready(<span class="prelude-val">None</span>) => {
this.done = <span class="bool-val">true</span>;
<span class="comment">// Let the state machine see EOF on next iteration —
// usually it'll go to Done.
</span><span class="kw">continue</span>;
}
Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(e))) => {
<span class="kw">return </span>Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Err</span>(ScrapflyError::Config(<span class="macro">format!</span>(
<span class="string">"batch stream error: {}"</span>,
e
)))));
}
Poll::Ready(<span class="prelude-val">Some</span>(<span class="prelude-val">Ok</span>(bytes))) => {
this.buf.extend_from_slice(<span class="kw-2">&</span>bytes);
<span class="kw">continue</span>;
}
}
}
}
}
<span class="doccomment">/// Convenience: take a reqwest `Response` whose Content-Type is
/// multipart/mixed and return a typed `Stream<Item=BatchPart>`.
</span><span class="kw">pub fn </span>parts_from_response(
resp: reqwest::Response,
) -> <span class="prelude-ty">Result</span><BatchPartStream<<span class="kw">impl </span>Stream<Item = <span class="prelude-ty">Result</span><Bytes, reqwest::Error>>>, ScrapflyError> {
<span class="kw">let </span>ct = resp
.headers()
.get(<span class="string">"content-type"</span>)
.and_then(|v| v.to_str().ok())
.unwrap_or(<span class="string">""</span>)
.to_string();
<span class="kw">let </span>(mime, params) = parse_content_type(<span class="kw-2">&</span>ct);
<span class="kw">if </span>mime != <span class="string">"multipart/mixed" </span>{
<span class="kw">return </span><span class="prelude-val">Err</span>(ScrapflyError::Config(<span class="macro">format!</span>(
<span class="string">"scrape_batch: expected Content-Type multipart/mixed, got {:?}"</span>,
ct
)));
}
<span class="kw">let </span>boundary = params.get(<span class="string">"boundary"</span>).cloned().ok_or_else(|| {
ScrapflyError::Config(<span class="macro">format!</span>(
<span class="string">"scrape_batch: Content-Type multipart/mixed missing boundary: {:?}"</span>,
ct
))
})<span class="question-mark">?</span>;
<span class="prelude-val">Ok</span>(BatchPartStream::new(resp.bytes_stream(), <span class="kw-2">&</span>boundary))
}
<span class="doccomment">/// Header prefix used by the server to forward upstream response
/// headers on proxified batch parts.
</span><span class="kw">const </span>UPSTREAM_PREFIX: <span class="kw-2">&</span>str = <span class="string">"x-scrapfly-upstream-"</span>;
<span class="doccomment">/// Synthesize a `BatchProxifiedResponse` from a proxified batch part.
/// Restores the upstream HTTP status from `X-Scrapfly-Scrape-Status`,
/// merges upstream headers (after stripping the `X-Scrapfly-Upstream-`
/// prefix) with Scrapfly metadata headers, and exposes the raw body.
</span><span class="kw">pub fn </span>build_proxified_response(part: BatchPart) -> BatchProxifiedResponse {
<span class="kw">let </span>status: u16 = part
.headers
.get(<span class="string">"x-scrapfly-scrape-status"</span>)
.and_then(|s| s.parse().ok())
.unwrap_or(<span class="number">200</span>);
<span class="kw">let </span><span class="kw-2">mut </span>out_headers: HashMap<String, String> = HashMap::new();
<span class="kw">for </span>(key, value) <span class="kw">in </span><span class="kw-2">&</span>part.headers {
<span class="kw">if </span>key == <span class="string">"content-type" </span>{
out_headers.insert(<span class="string">"content-type"</span>.into(), value.clone());
} <span class="kw">else if let </span><span class="prelude-val">Some</span>(stripped) = key.strip_prefix(UPSTREAM_PREFIX) {
out_headers.insert(stripped.to_string(), value.clone());
} <span class="kw">else if </span>key.starts_with(<span class="string">"x-scrapfly-"</span>) {
out_headers.insert(key.clone(), value.clone());
}
}
<span class="comment">// Normalize X-Scrapfly-Log-Uuid → X-Scrapfly-Log for parity with
// the single-scrape proxified response.
</span><span class="kw">if </span>!out_headers.contains_key(<span class="string">"x-scrapfly-log"</span>) {
<span class="kw">if let </span><span class="prelude-val">Some</span>(log_uuid) = out_headers.get(<span class="string">"x-scrapfly-log-uuid"</span>).cloned() {
out_headers.insert(<span class="string">"x-scrapfly-log"</span>.into(), log_uuid);
}
}
BatchProxifiedResponse {
status,
headers: out_headers,
body: part.body,
}
}
<span class="doccomment">/// Decode a part body according to its Content-Type. Supports
/// `application/json` (default) and `application/msgpack`.
</span><span class="kw">pub fn </span>decode_part_body<T: serde::de::DeserializeOwned>(
part: <span class="kw-2">&</span>BatchPart,
) -> <span class="prelude-ty">Result</span><T, ScrapflyError> {
<span class="kw">let </span>ct = part
.headers
.get(<span class="string">"content-type"</span>)
.cloned()
.unwrap_or_else(|| <span class="string">"application/json"</span>.to_string());
<span class="kw">if </span>ct.starts_with(<span class="string">"application/json"</span>) {
<span class="kw">return </span>serde_json::from_slice::<T>(<span class="kw-2">&</span>part.body)
.map_err(|e| ScrapflyError::Config(<span class="macro">format!</span>(<span class="string">"scrape_batch: decode JSON part: {}"</span>, e)));
}
<span class="kw">if </span>ct.starts_with(<span class="string">"application/msgpack"</span>) || ct.starts_with(<span class="string">"application/x-msgpack"</span>) {
<span class="kw">return </span>rmp_serde::from_slice::<T>(<span class="kw-2">&</span>part.body).map_err(|e| {
ScrapflyError::Config(<span class="macro">format!</span>(<span class="string">"scrape_batch: decode msgpack part: {}"</span>, e))
});
}
<span class="prelude-val">Err</span>(ScrapflyError::Config(<span class="macro">format!</span>(
<span class="string">"scrape_batch: unsupported part Content-Type: {:?}"</span>,
ct
)))
}
</code></pre></div></section></main></body></html>