Why do some downloads not show file size and / or ETAs?
When you make an HTTP connection, there are a bunch of pieces of metadata that are sent before the data. One of those is Content-Length, which tells your client how long the data portion is going to be. If you don't see a file size in a download, it means the server didn't send a Content-Length h…
The Short Answer
When you make an HTTP connection, there are a bunch of pieces of metadata that are sent before the data. One of those is Content-Length, which tells your client how long the data portion is going to be. If you don't see a file size in a download, it means the server didn't send a Content-Length header, so your client has no idea how much data is going to come, and it just needs to continue receiving data until the server stops sending it.
Analysis
Key Concepts: Data, content-length, client
This explanation focuses on data, content-length, client and spans 84 words across 3 sentences. The depth is typical for Technology questions (category average: 75 words), striking a balance between accessibility and completeness.
What This Answer Covers
The explanation opens with: “When you make an HTTP connection, there are a bunch of pieces of metadata that are sent before the data.” It then elaboratesultimately building toward a complete picture across 3 connected points.
How This Compares in Technology
Ranked #181 of 500 Technology questions by answer depth (top 37%). This falls in the detailed tier — above average depth. The explanation goes beyond surface-level but keeps things accessible.
Frequently Asked Questions
Is there a simple explanation for why some downloads not show file size and / or etas?
When you make an HTTP connection, there are a bunch of pieces of metadata that are sent before the data. One of those is Content-Length, which tells your client how long the data portion is going to be. If you don't see a file size in a download, it…
How detailed is this explanation compared to similar Technology questions?
This is an above-average answer at 84 words, ranked #181 of 500 Technology questions by depth. The key concepts covered are data, content-length, client.
What approach does this answer take to explain some downloads not show file size and / or etas?
The explanation uses direct explanation across 84 words. It is categorized under Technology and addresses the question through 1 analytical lens.