infiniflow/ragflow · error · ValueError

Invalid base64 encoding: {str(e)}

Error message

Invalid base64 encoding: {str(e)}

What it means

Error "Invalid base64 encoding: {str(e)}" thrown in infiniflow/ragflow.

Source

Thrown at agent/tools/code_exec.py:222

class Language(StrEnum):
    PYTHON = "python"
    NODEJS = "nodejs"


class CodeExecutionRequest(BaseModel):
    code_b64: str = Field(..., description="Base64 encoded code string")
    language: str = Field(default=Language.PYTHON.value, description="Programming language")
    arguments: Optional[dict] = Field(default={}, description="Arguments")

    @field_validator("code_b64")
    @classmethod
    def validate_base64(cls, v: str) -> str:
        try:
            base64.b64decode(v, validate=True)
            return v
        except Exception as e:
            raise ValueError(f"Invalid base64 encoding: {str(e)}")

    @field_validator("language", mode="before")
    @classmethod
    def normalize_language(cls, v) -> str:
        if isinstance(v, str):
            low = v.lower()
            if low in ("python", "python3"):
                return "python"
            elif low in ("javascript", "nodejs"):
                return "nodejs"
        raise ValueError(f"Unsupported language: {v}")


class CodeExecParam(ToolParamBase):
    """
    Define the code sandbox component parameters.
    """

View on GitHub (pinned to 554fb1133a)

Solutions

1. Ensure the attachment content is valid base64 before decoding.
2. Strip whitespace and use base64.b64decode with validate=True to catch bad input early.

Example fix

import base64
data = base64.b64decode(payload, validate=True)

When it happens

Trigger: Thrown at agent/tools/code_exec.py:222 when the library encounters an invalid state.

Common situations: A base64 payload passed to CodeExec is truncated, URL-encoded, or contains invalid characters; validating the encoding before decode prevents this error.

AI-assisted analysis of infiniflow/ragflow@554fb1133a (2026-08-15). Data as JSON: /api/errors/c1354d43ae690387. Report an issue: GitHub.