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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchAn HTTP 200 OK means a request succeeded at the protocol level; it does not mean the response contains the article you wanted or that your extractor can read it. MDN Web Docs puts it plainly: “The HTTP 200 OK successful response status code indicates that a request has succeeded.” For a GET request, the resource is retrieved in the response body—but identifying that resource and judging its content are separate jobs. (MDN Web Docs: 200 OK)
Why can a request return 200 but no article text?
Because status, representation, and extraction describe different stages. A server can successfully return a response whose body is an HTML page, JSON, or another representation. Even when the body is HTML, it may not be the page you expected, and a successful fetch does not guarantee that an article extractor will recognize useful text.
The Rust Book demonstrates the distinction with a minimal response line, HTTP/1.1 200 OKrnrn: it has no headers and no body. Its instructional server also initially returns the same HTML regardless of the requested path, showing why route selection must be checked separately from response status. These examples illustrate the boundary; they are not production-ready server guidance. (The Rust Programming Language, Chapter 21)
What should you inspect before blaming the extractor?
- Record the request and response. Capture the requested URL and method, final status, relevant redirect history, response headers, and a bounded sample of the raw body. Avoid logging credentials, tokens, or full sensitive pages.
- Check that the response is the intended resource. Compare the URL and body with what you expect. Inspect
Content-Typeas well as status: a 200 does not tell you that the response is an article or even HTML. (MDN Web Docs: 200 OK; Reqwest Response documentation) - Decode the body deliberately. Reqwest exposes response status and headers, along with body-reading methods. Its
.text()method uses the charset supplied by the response’sContent-Typewhere available and otherwise defaults to UTF-8, subject to the crate’s charset feature. Check your project’s actual feature configuration and dependency documentation. (Reqwest Response documentation) - Parse only after confirming the input. If the body is the expected HTML, pass it to your parser or extractor. Check whether the extracted title and text are plausible for the page rather than treating “no error” as success.
- Keep the original input available for diagnosis. Where practical, retain a bounded or otherwise safely managed copy of the response body so you can compare the fetched HTML with the extraction result.
How do you locate the failing layer?
Work from the outside in. This keeps an HTTP success from concealing a problem farther down the pipeline.
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- Wrong response or body: The request succeeded, but the returned resource is not the expected page. Recheck the URL, method, redirects, headers, and body.
- Decoding problem: The body bytes were interpreted with an unsuitable character encoding. Compare the declared charset with the decoding behavior you configured.
- Parsing mismatch: The decoded document is not valid or compatible with the HTML assumptions your parser makes.
- Extraction mismatch: The HTML parsed, but the page structure or content does not fit the extractor’s heuristics well enough to produce the result you expect.
These are distinct diagnostic possibilities, not a claim about what caused any particular incident. Comparing the raw response, decoded HTML, and extracted output helps you identify where the result first diverges from expectations.
How do you extract article content in Rust?
A Readability-style extractor is a practical starting point when the input is HTML and the goal is to identify the main article. Mozilla Readability parses a document and exposes results such as title, processed HTML, text content, excerpt, and metadata. (Mozilla Readability README)
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Rust’s legible crate ports Readability’s approach. Its readerability precheck can help screen a page, but the result is explicitly heuristic: it does not guarantee that extraction will succeed or produce the content you want. (legible crate documentation)
When relative links or media in the extracted content need to resolve correctly, provide the page’s absolute URL as the extraction base. And treat the extractor’s HTML output as untrusted input: legible says that it cleans content but is not an HTML security sanitizer. Sanitize before rendering it in a browser or application. (legible crate documentation)
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Should you use an extractor or own more of the web layer?
They solve related but different problems. An extractor supplies article-focused heuristics; a web layer can give you control over fetching, response inspection, parsing, and failure reporting. You can also combine them: inspect and validate the response in your own code, then pass suitable HTML to an extractor.
| Decision axis | Readability-style extractor | Owning more of the pipeline |
|---|---|---|
| Diagnostics | Provides article-focused output after receiving HTML. Reqwest can expose status, headers, and body before extraction. (Reqwest Response documentation) | Lets you define what to record and how to report failures at each stage; you remain responsible for implementing those checks. |
| Extraction effort | Readability and legible provide a heuristic approach and structured outputs. (Mozilla Readability README; legible crate documentation) |
You must supply your own extraction rules or pipeline if you do not use an extractor. |
| Input assumptions | Works from HTML; a base URL matters when resolving relative resources. (legible crate documentation) | You choose how to validate and transform inputs, including how to handle non-HTML responses. |
| Failure visibility | A readerability precheck can screen likely inputs, but cannot guarantee a good result. (legible crate documentation) | You can define explicit checks and errors, but must build and maintain them. |
| Security | Extracted HTML still requires sanitization before rendering. (legible crate documentation) | You still need an appropriate sanitization step if your pipeline emits HTML for rendering. |
| Maintenance | The cited documentation describes capabilities, not comparative maintenance costs. | Maintenance burden depends on your implementation and requirements; the cited documentation does not establish a general cost comparison. |
Build or own more of the layer when you need specific control over response inspection and failure reporting that your current setup does not provide. An extractor can still handle the article-focused part. The choice depends on your requirements; the documented capabilities alone do not establish that a custom layer is always preferable.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What a useful bug report should show
To explain a particular “200, but no article” bug—including why a custom Rust web layer was necessary—show the smallest reproducible chain from request to output:
- The request method and URL, with secrets removed.
- The final status, relevant redirect history, and response headers.
- A short, safe sample of the response body, plus whether it is the expected page.
- The decoding and parsing steps, and the extractor’s output or error.
- The expected result, the actual result, and which existing tool or behavior failed to meet the need.
Without those details, HTTP and extractor documentation can explain how to investigate the symptom, but cannot establish the cause of a specific incident or prove that writing a custom web layer fixed it.
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