Marc Mintel
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Note this is an async\n * function to conform to the Detector interface.\n *\n * @param config The resource detection config\n */\n detect(_config?: ResourceDetectionConfig): DetectedResource {\n const attributes: Attributes = {};\n\n const rawAttributes = getStringFromEnv('OTEL_RESOURCE_ATTRIBUTES');\n const serviceName = getStringFromEnv('OTEL_SERVICE_NAME');\n\n if (rawAttributes) {\n try {\n const parsedAttributes = this._parseResourceAttributes(rawAttributes);\n Object.assign(attributes, parsedAttributes);\n } catch (e) {\n diag.debug(`EnvDetector failed: ${e.message}`);\n }\n }\n\n if (serviceName) {\n attributes[ATTR_SERVICE_NAME] = serviceName;\n }\n\n return { attributes };\n }\n\n /**\n * Creates an attribute map from the OTEL_RESOURCE_ATTRIBUTES environment\n * variable.\n *\n * OTEL_RESOURCE_ATTRIBUTES: A comma-separated list of attributes describing\n * the source in more detail, e.g. “key1=val1,key2=val2”. Domain names and\n * paths are accepted as attribute keys. Values may be quoted or unquoted in\n * general. If a value contains whitespace, =, or \" characters, it must\n * always be quoted.\n *\n * @param rawEnvAttributes The resource attributes as a comma-separated list\n * of key/value pairs.\n * @returns The sanitized resource attributes.\n */\n private _parseResourceAttributes(rawEnvAttributes?: string): Attributes {\n if (!rawEnvAttributes) return {};\n\n const attributes: Attributes = {};\n const rawAttributes: string[] = rawEnvAttributes.split(\n this._COMMA_SEPARATOR,\n -1\n );\n for (const rawAttribute of rawAttributes) {\n const keyValuePair: string[] = rawAttribute.split(\n this._LABEL_KEY_VALUE_SPLITTER,\n -1\n );\n if (keyValuePair.length !== 2) {\n continue;\n }\n let [key, value] = keyValuePair;\n // Leading and trailing whitespaces are trimmed.\n key = key.trim();\n value = value.trim().split(/^\"|\"$/).join('');\n if (!this._isValidAndNotEmpty(key)) {\n throw new Error(`Attribute key ${this._ERROR_MESSAGE_INVALID_CHARS}`);\n }\n if (!this._isValid(value)) {\n throw new Error(`Attribute value ${this._ERROR_MESSAGE_INVALID_VALUE}`);\n }\n attributes[key] = decodeURIComponent(value);\n }\n return attributes;\n }\n\n /**\n * Determines whether the given String is a valid printable ASCII string with\n * a length not exceed _MAX_LENGTH characters.\n *\n * @param str The String to be validated.\n * @returns Whether the String is valid.\n */\n private _isValid(name: string): boolean {\n return name.length <= this._MAX_LENGTH && this._isBaggageOctetString(name);\n }\n\n // https://www.w3.org/TR/baggage/#definition\n private _isBaggageOctetString(str: string): boolean {\n for (let i = 0; i < str.length; i++) {\n const ch = str.charCodeAt(i);\n if (ch < 0x21 || ch === 0x2c || ch === 0x3b || ch === 0x5c || ch > 0x7e) {\n return false;\n }\n }\n return true;\n }\n\n /**\n * Determines whether the given String is a valid printable ASCII string with\n * a length greater than 0 and not exceed _MAX_LENGTH characters.\n *\n * @param str The String to be validated.\n * @returns Whether the String is valid and not empty.\n */\n private _isValidAndNotEmpty(str: string): boolean {\n return str.length > 0 && this._isValid(str);\n }\n}\n\nexport const envDetector = new EnvDetector();\n"]} |