{"record":{"id":"2e3fc419bf394595","repo":"FlowiseAI/Flowise","slug":"invalid-json-in-the-baseoptions-exception-2e3fc4","errorCode":null,"errorMessage":"Invalid JSON in the BaseOptions: ${exception}","messagePattern":"Invalid JSON in the BaseOptions: (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/components/nodes/chatmodels/Deepseek/Deepseek.ts","lineNumber":194,"sourceCode":"        if (stopSequence) {\n            const stopSequenceArray = stopSequence.split(',').map((item) => item.trim())\n            obj.stop = stopSequenceArray\n        }\n        if (thinking) {\n            obj.modelKwargs = {\n                ...obj.modelKwargs,\n                thinking: { type: 'enabled' }\n            }\n        }\n\n        if (baseOptions) {\n            try {\n                const parsedBaseOptions = typeof baseOptions === 'object' ? baseOptions : JSON.parse(baseOptions)\n                obj.configuration = {\n                    defaultHeaders: parsedBaseOptions\n                }\n            } catch (exception) {\n                throw new Error('Invalid JSON in the BaseOptions: ' + exception)\n            }\n        }\n\n        const model = new ChatDeepSeek(obj)\n        return model\n    }\n}\n\nmodule.exports = { nodeClass: Deepseek_ChatModels }\n","sourceCodeStart":176,"sourceCodeEnd":204,"githubUrl":"https://github.com/FlowiseAI/Flowise/blob/abe4a8601a058047b350c260676826e21dd14101/packages/components/nodes/chatmodels/Deepseek/Deepseek.ts#L176-L204","documentation":"The Deepseek chat node inlines its BaseOptions parsing inside the try block (rather than pre-parsing into a variable). When the BaseOptions string fails JSON.parse, the SyntaxError is caught and re-thrown with the generic 'Invalid JSON in the BaseOptions' label. The parsed value feeds defaultHeaders under obj.configuration, then ChatDeepSeek is constructed.","triggerScenarios":"The Deepseek node's BaseOptions field holds malformed JSON; reached only when baseOptions is truthy. Unlike the sibling nodes, this parser also writes obj.configuration inside the same try, so a parse failure aborts the whole configuration build.","commonSituations":"Users configuring custom headers for a DeepSeek-compatible proxy paste invalid JSON; trailing commas; unquoted keys; smart quotes from docs; confusion between the baseOptions field and the basePath field.","solutions":["JSON-lint the BaseOptions value before saving.","Use canonical JSON: double-quoted keys/values, no trailing commas, no comments.","Pass an object input when constructing programmatically (the typeof === 'object' branch avoids parsing).","If you only need a custom base URL, use basePath instead of baseOptions."],"exampleFix":"// before\n{ baseURL: \"https://ds.proxy\", } // unquoted key + trailing comma -> throws [98]\n\n// after\n{ \"baseURL\": \"https://ds.proxy\" }","handlingStrategy":"validation","validationCode":"function parseBaseOptions(raw) {\n  if (!raw) return undefined\n  if (typeof raw === 'object') return raw\n  try { return JSON.parse(raw) }\n  catch (e) { throw new Error(`Deepseek BaseOptions JSON invalid: ${e.message}`) }\n}\nconst parsedBaseOptions = parseBaseOptions(nodeData.inputs?.baseOptions)\nif (parsedBaseOptions) obj.configuration = { defaultHeaders: parsedBaseOptions }","typeGuard":"function isHeadersObject(v: unknown): v is Record<string, string> {\n  if (typeof v !== 'object' || v === null || Array.isArray(v)) return false\n  return Object.values(v).every(x => typeof x === 'string')\n}","tryCatchPattern":"try {\n  return await initDeepseek(nodeData, options)\n} catch (e) {\n  if (e.message.includes('Invalid JSON in the BaseOptions')) {\n    throw new Error('Correct BaseOptions JSON on the Deepseek node (or use basePath for a custom URL).')\n  }\n  throw e\n}","preventionTips":["JSON-lint BaseOptions before saving.","Use basePath (not baseOptions) for a custom base URL.","Pass object inputs when constructing programmatically.","Validate JSON in the UI before the request reaches the try block."],"tags":["json","configuration","validation","deepseek","default-headers"],"backgroundTag":null,"analyzedSha":"abe4a8601a058047b350c260676826e21dd14101","analyzedAt":"2026-08-12T16:04:40.823Z","schemaVersion":2},"datasetVersion":"2026-08-12T18:17:37.767Z"}