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chore(get-support): refactor to share http logic in core module
Closes #186
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,3 @@ | ||
| export { runQuery, LogFunction, LogMessage, LogStep, LogAction } from './runQuery' | ||
| export { default as GraphQLOptions} from './graphqlOptions' | ||
| export { runHttpQuery, HttpQueryRequest, HttpQueryError } from './runHttpQuery'; | ||
| export { default as GraphQLOptions } from './graphqlOptions' |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| import { formatError, ExecutionResult } from 'graphql'; | ||
| import { runQuery } from './runQuery'; | ||
| import { default as GraphQLOptions, isOptionsFunction } from './graphqlOptions'; | ||
|
|
||
| export interface HttpQueryRequest { | ||
| method: string; | ||
| query: string; | ||
| options: GraphQLOptions | Function; | ||
| } | ||
|
|
||
| export class HttpQueryError extends Error { | ||
| public statusCode: number; | ||
| public isGraphQLError: boolean; | ||
| public headers: { [key: string]: string }; | ||
|
|
||
| constructor (statusCode: number, message: string, isGraphQLError: boolean = false, headers?: { [key: string]: string }) { | ||
| super(message); | ||
| this.statusCode = statusCode; | ||
| this.isGraphQLError = isGraphQLError; | ||
| this.headers = headers; | ||
| } | ||
| } | ||
|
|
||
| export async function runHttpQuery(handlerArguments: Array<any>, request: HttpQueryRequest): Promise<string> { | ||
| let optionsObject: GraphQLOptions; | ||
| if (isOptionsFunction(request.options)) { | ||
| try { | ||
| optionsObject = await request.options(...handlerArguments); | ||
| } catch (e) { | ||
| throw new HttpQueryError(500, `Invalid options provided to ApolloServer: ${e.message}`); | ||
| } | ||
| } else { | ||
| optionsObject = request.options; | ||
| } | ||
|
|
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| const formatErrorFn = optionsObject.formatError || formatError; | ||
| let requestPayload; | ||
|
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| switch ( request.method ) { | ||
| case 'POST': | ||
| if ( !request.query ) { | ||
| throw new HttpQueryError(500, 'POST body missing. Did you forget use body-parser middleware?'); | ||
| } | ||
|
|
||
| requestPayload = request.query; | ||
| break; | ||
| case 'GET': | ||
| if ( !request.query || (Object.keys(request.query).length === 0) ) { | ||
| throw new HttpQueryError(400, 'GET query missing.'); | ||
| } | ||
|
|
||
| requestPayload = request.query; | ||
| break; | ||
|
|
||
| default: | ||
| throw new HttpQueryError(405, 'Apollo Server supports only GET/POST requests.', false, { | ||
| 'Allow': 'GET, POST', | ||
| }); | ||
| } | ||
|
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||
| let isBatch = true; | ||
| // TODO: do something different here if the body is an array. | ||
| // Throw an error if body isn't either array or object. | ||
| if (!Array.isArray(requestPayload)) { | ||
| isBatch = false; | ||
| requestPayload = [requestPayload]; | ||
| } | ||
|
|
||
| let responses: Array<ExecutionResult> = []; | ||
| for (let requestParams of requestPayload) { | ||
| try { | ||
| const query = requestParams.query; | ||
| const operationName = requestParams.operationName; | ||
| let variables = requestParams.variables; | ||
|
|
||
| if (typeof variables === 'string') { | ||
| try { | ||
| variables = JSON.parse(variables); | ||
| } catch (error) { | ||
| throw new HttpQueryError(400, 'Variables are invalid JSON.'); | ||
| } | ||
| } | ||
|
|
||
| // Shallow clone context for queries in batches. This allows | ||
| // users to distinguish multiple queries in the batch and to | ||
| // modify the context object without interfering with each other. | ||
| let context = optionsObject.context; | ||
| if (isBatch) { | ||
| context = Object.assign({}, context || {}); | ||
| } | ||
|
|
||
| let params = { | ||
| schema: optionsObject.schema, | ||
| query: query, | ||
| variables: variables, | ||
| context: context, | ||
| rootValue: optionsObject.rootValue, | ||
| operationName: operationName, | ||
| logFunction: optionsObject.logFunction, | ||
| validationRules: optionsObject.validationRules, | ||
| formatError: formatErrorFn, | ||
| formatResponse: optionsObject.formatResponse, | ||
| debug: optionsObject.debug, | ||
| }; | ||
|
|
||
| if (optionsObject.formatParams) { | ||
| params = optionsObject.formatParams(params); | ||
| } | ||
|
|
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| responses.push(await runQuery(params)); | ||
| } catch (e) { | ||
| responses.push({ errors: [formatErrorFn(e)] }); | ||
| } | ||
| } | ||
|
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||
| if (!isBatch) { | ||
| const gqlResponse = responses[0]; | ||
| if (gqlResponse.errors && typeof gqlResponse.data === 'undefined') { | ||
| throw new HttpQueryError(400, JSON.stringify(gqlResponse), true, { | ||
| 'Content-Type': 'application/json', | ||
| }); | ||
| } | ||
| return JSON.stringify(gqlResponse); | ||
| } | ||
|
|
||
| return JSON.stringify(responses); | ||
| } |
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