设置正确的 MIME 类型
告知客户端内容是文本、JSON 还是其他类型。
设置正确的 MIME 类型 是 CoddyKit 上的免费 MCP Academy 课时。 这是第 4 节课，共 4 节。 你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。 这是 MCP Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 MCP Academy 课程共包含 4 节课。
本课时的部分内容尚未翻译，以英文显示。
What a MIME Type Is
A MIME type is a short label that tells a client what kind of content a resource holds, such as plain text, JSON, or an image.
Why It Matters
The label lets the client render and parse content correctly. Without it, a client might show raw JSON as text or mishandle a binary blob. 🏷️
The Text Default
If you say nothing, MCP assumes text/plain. That suits notes and docs, but structured data deserves a more precise type.
Common Types
You will reach for a few often: text/plain for prose, application/json for data, and text/markdown for formatted documents the model can parse.
Declare It in FastMCP
Set the type with the mime_type argument on the resource decorator so clients know exactly how to read the body.
@mcp.resource("data://stats", mime_type="application/json")
def stats():
return '{"users": 42}'JSON the Right Way
For JSON, label it application/json and return a valid JSON string. Build it with the json library so quoting and escaping are always correct.
import json
@mcp.resource("data://stats", mime_type="application/json")
def stats():
return json.dumps({"users": 42})Markdown for Docs
Serving a README or guide? Use text/markdown so capable clients render headings and lists instead of showing raw symbols.
@mcp.resource("docs://readme", mime_type="text/markdown")
def readme():
return "# Welcome\nGetting started..."Match Type to Content
The type must honestly describe the body. Labeling plain text as JSON makes clients try to parse it and fail, so always keep them in sync.
Binary Needs Care
For images or PDFs you set a binary MIME type like image/png, and the bytes travel base64-encoded so they survive a text protocol.
Detect from Extension
When serving files, Python can guess a type from the filename. The mimetypes library maps an extension to its standard MIME type for you.
import mimetypes
mt, _ = mimetypes.guess_type("report.json")
# mt == "application/json"A Small Contract
Think of the MIME type as a tiny contract: it promises the client what shape the bytes take so both sides agree before parsing.
Quick Check
Pick the correct type for structured data.
Recap
The MIME type tells clients how to read a resource. Use mime_type to set text, JSON, markdown, or binary, and keep it honest. 🏷️
常见问题解答
「设置正确的 MIME 类型」课时是免费的吗？
是的 — 「设置正确的 MIME 类型」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 MCP Academy 课程的其余内容，请升级到 CoddyKit PRO。 MCP Academy 课程共包含 4 节课。
「设置正确的 MIME 类型」这节课中我会学到什么？
告知客户端内容是文本、JSON 还是其他类型。 你通过在浏览器中直接运行的动手代码来练习 MCP Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。
学习 MCP Academy 需要有经验吗？
无需任何先前经验。CoddyKit 上的 MCP Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。 这是第 4 节课，共 4 节。
「设置正确的 MIME 类型」课时需要多长时间？
大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。
我能在这节 MCP Academy 课中编写并运行代码吗？
能。每节 MCP Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。