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NS_E_CURL_INVALIDCHAR
Investigating NS_E_CURL_INVALIDCHAR without losing the first failure
This result (0xC00D1325) marks the raw URL contains a character that is neither legal nor correctly escaped. The code belongs to the invalidchar URL check, which is why a later network, codec or metadata error must be recorded separately instead of replacing it.
Before any socket is opened, the player decomposes a URL into scheme, authority, host, port, path and escaped data in the invalidchar diagnostic record. It may also combine a relative reference with a base URL or convert a file URL into a path; each operation has a different validity rule when isolating the invalidchar case. In the case of this result, preserve the earliest lower-level result because wrappers can map several different causes to the same HRESULT at the invalidchar checkpoint.
Where the failure occurs
At the invalidchar URL check, the component has already accepted the earlier prerequisites but cannot cross the boundary described as the raw URL contains a character that is neither legal nor correctly escaped. That distinction matters: success in opening the file, resolving the host or creating a COM object does not prove that this later operation is valid during a controlled invalidchar retest.
The strongest reproduction is preserve the raw URL and replace only the malformed percent-escape or illegal character with its RFC 3986 representation for evidence about invalidchar. If the same call advances after that single change, the evidence supports the boundary. If it does not, return to the first nested error rather than widening the repair in the invalidchar diagnostic record.
What the parser result proves
| Retest result | Interpretation |
|---|---|
| The identical call still returns the code | The values governing the invalidchar URL check are unchanged, or the caller is still using an older object generation. |
| A fresh object succeeds | Lifetime or cached state contributed to this result; correct object recreation instead of applying a machine-wide workaround at the invalidchar checkpoint. |
| The call advances to another HRESULT | the invalidchar URL check boundary was cleared. Diagnose the new code at its own format, graph, URL, network or metadata stage during a controlled invalidchar retest. |
| Only one resource fails | The evidence favors content, URL, publishing point, stream, attribute or object-specific state rather than a global outage for evidence about invalidchar. |
Preserve the raw and parsed URL
| Capture | Why it matters |
|---|---|
| Owning call | Record the API method, object identity, thread or callback and timestamp for the invalidchar URL check. |
| Decisive values | the original unmodified string, character count, encoding, base URL if any, parsed scheme, host, port and path, plus required and supplied output-buffer lengths in the invalidchar diagnostic record. |
| Object generation | Note when the reader, writer, graph, URL object, streaming session or metadata provider was created; stale state can reproduce this result after configuration has changed. |
| First nested result | Keep the earliest codec, COM, socket, DNS, parser or provider status before it; later UI messages are less specific. |
| Comparison case | Use one known-good resource that exercises the same the invalidchar URL check while changing only the rejected precondition. |
One-component URL experiment
- Log
0xC00D1325, it, the exact operation and the first failure time during a controlled invalidchar retest. - Preserve the original unmodified string, character count, encoding, base URL if any, parsed scheme, host, port and path, plus required and supplied output-buffer lengths for evidence about invalidchar.
- Do not reuse a graph, session, reader or metadata object created before the relevant configuration or resource changed before closing the invalidchar incident.
- Perform one isolated test: preserve the raw URL and replace only the malformed percent-escape or illegal character with its RFC 3986 representation in the invalidchar diagnostic record.
- Repeat through the same API and protocol path; a different player or local-copy test is useful only as a comparison, not as proof that the invalidchar URL check is fixed.
- Confirm the expected next state and retain any new HRESULT as a separate downstream result at the invalidchar checkpoint.
Nearby results are not interchangeable
Main distinction: URL syntax errors occur before server DNS, proxy selection or streaming-session creation while tracing the invalidchar path.
| Nearby HRESULT | How to compare it |
|---|---|
NS_E_CURL_NOTSAFE | Compare the owning API and first rejected value; it belongs to a neighboring checkpoint, not automatically to the same cause as it. |
NS_E_CURL_INVALIDHOSTNAME | Use object state and operation order to decide which code is authoritative when both appear in one trace for evidence about invalidchar. |
NS_E_CURL_INVALIDPATH | Retain it separately if it appears only after the condition has cleared. |
Misleading actions
- blindly decoding and re-encoding the whole URL, which can change reserved delimiters and resource identity in the invalidchar diagnostic record.
- Do not erase the first occurrence by repeatedly retrying; callbacks and reconnects can replace the useful state with a later wrapper error when isolating the invalidchar case.
- Do not publish credentials, protected-content material or complete private URLs at the invalidchar checkpoint. Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the invalidchar URL check.
Technical references
- RFC 3986: URI generic syntax
- Handling URLs with WinINet
- CreateUri
- ParseURL
- Microsoft HRESULT registry
Close the incident only after the original the operation succeeds on a current object and the expected next state is observed during a controlled invalidchar retest.
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