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{ invariant } from \"../../utilities/globals/index.js\";\n\nimport type { DefinitionNode } from \"graphql\";\n\nimport { ApolloLink } from \"../core/index.js\";\nimport { Observable, hasDirectives } from \"../../utilities/index.js\";\nimport { serializeFetchParameter } from \"./serializeFetchParameter.js\";\nimport { selectURI } from \"./selectURI.js\";\nimport {\n handleError,\n readMultipartBody,\n parseAndCheckHttpResponse,\n} from \"./parseAndCheckHttpResponse.js\";\nimport { checkFetcher } from \"./checkFetcher.js\";\nimport type { HttpOptions } from \"./selectHttpOptionsAndBody.js\";\nimport {\n selectHttpOptionsAndBodyInternal,\n defaultPrinter,\n fallbackHttpConfig,\n} from \"./selectHttpOptionsAndBody.js\";\nimport { rewriteURIForGET } from \"./rewriteURIForGET.js\";\nimport { fromError, filterOperationVariables } from \"../utils/index.js\";\nimport {\n maybe,\n getMainDefinition,\n removeClientSetsFromDocument,\n} from \"../../utilities/index.js\";\n\nconst backupFetch = maybe(() => fetch);\n\nexport const createHttpLink = (linkOptions: HttpOptions = {}) => {\n let {\n uri = \"/graphql\",\n // use default global fetch if nothing passed in\n fetch: preferredFetch,\n print = defaultPrinter,\n includeExtensions,\n preserveHeaderCase,\n useGETForQueries,\n includeUnusedVariables = false,\n ...requestOptions\n } = linkOptions;\n\n if (__DEV__) {\n // Make sure at least one of preferredFetch, window.fetch, or backupFetch is\n // defined, so requests won't fail at runtime.\n checkFetcher(preferredFetch || backupFetch);\n }\n\n const linkConfig = {\n http: { includeExtensions, preserveHeaderCase },\n options: requestOptions.fetchOptions,\n credentials: requestOptions.credentials,\n headers: requestOptions.headers,\n };\n\n return new ApolloLink((operation) => {\n let chosenURI = selectURI(operation, uri);\n\n const context = operation.getContext();\n\n // `apollographql-client-*` headers are automatically set if a\n // `clientAwareness` object is found in the context. These headers are\n // set first, followed by the rest of the headers pulled from\n // `context.headers`. If desired, `apollographql-client-*` headers set by\n // the `clientAwareness` object can be overridden by\n // `apollographql-client-*` headers set in `context.headers`.\n const clientAwarenessHeaders: {\n \"apollographql-client-name\"?: string;\n \"apollographql-client-version\"?: string;\n } = {};\n\n if (context.clientAwareness) {\n const { name, version } = context.clientAwareness;\n if (name) {\n clientAwarenessHeaders[\"apollographql-client-name\"] = name;\n }\n if (version) {\n clientAwarenessHeaders[\"apollographql-client-version\"] = version;\n }\n }\n\n const contextHeaders = { ...clientAwarenessHeaders, ...context.headers };\n\n const contextConfig = {\n http: context.http,\n options: context.fetchOptions,\n credentials: context.credentials,\n headers: contextHeaders,\n };\n\n if (hasDirectives([\"client\"], operation.query)) {\n const transformedQuery = removeClientSetsFromDocument(operation.query);\n\n if (!transformedQuery) {\n return fromError(\n new Error(\n \"HttpLink: Trying to send a client-only query to the server. To send to the server, ensure a non-client field is added to the query or set the `transformOptions.removeClientFields` option to `true`.\"\n )\n );\n }\n\n operation.query = transformedQuery;\n }\n\n //uses fallback, link, and then context to build options\n const { options, body } = selectHttpOptionsAndBodyInternal(\n operation,\n print,\n fallbackHttpConfig,\n linkConfig,\n contextConfig\n );\n\n if (body.variables && !includeUnusedVariables) {\n body.variables = filterOperationVariables(\n body.variables,\n operation.query\n );\n }\n\n let controller: AbortController | undefined;\n if (!options.signal && typeof AbortController !== \"undefined\") {\n controller = new AbortController();\n options.signal = controller.signal;\n }\n\n // If requested, set method to GET if there are no mutations.\n const definitionIsMutation = (d: DefinitionNode) => {\n return d.kind === \"OperationDefinition\" && d.operation === \"mutation\";\n };\n const definitionIsSubscription = (d: DefinitionNode) => {\n return d.kind === \"OperationDefinition\" && d.operation === \"subscription\";\n };\n const isSubscription = definitionIsSubscription(\n getMainDefinition(operation.query)\n );\n // does not match custom directives beginning with @defer\n const hasDefer = hasDirectives([\"defer\"], operation.query);\n if (\n useGETForQueries &&\n !operation.query.definitions.some(definitionIsMutation)\n ) {\n options.method = \"GET\";\n }\n\n if (hasDefer || isSubscription) {\n options.headers = options.headers || {};\n let acceptHeader = \"multipart/mixed;\";\n // Omit defer-specific headers if the user attempts to defer a selection\n // set on a subscription and log a warning.\n if (isSubscription && hasDefer) {\n invariant.warn(\"Multipart-subscriptions do not support @defer\");\n }\n\n if (isSubscription) {\n acceptHeader +=\n \"boundary=graphql;subscriptionSpec=1.0,application/json\";\n } else if (hasDefer) {\n acceptHeader += \"deferSpec=20220824,application/json\";\n }\n options.headers.accept = acceptHeader;\n }\n\n if (options.method === \"GET\") {\n const { newURI, parseError } = rewriteURIForGET(chosenURI, body);\n if (parseError) {\n return fromError(parseError);\n }\n chosenURI = newURI;\n } else {\n try {\n (options as any).body = serializeFetchParameter(body, \"Payload\");\n } catch (parseError) {\n return fromError(parseError);\n }\n }\n\n return new Observable((observer) => {\n // Prefer linkOptions.fetch (preferredFetch) if provided, and otherwise\n // fall back to the *current* global window.fetch function (see issue\n // #7832), or (if all else fails) the backupFetch function we saved when\n // this module was first evaluated. This last option protects against the\n // removal of window.fetch, which is unlikely but not impossible.\n const currentFetch = preferredFetch || maybe(() => fetch) || backupFetch;\n\n const observerNext = observer.next.bind(observer);\n currentFetch!(chosenURI, options)\n .then((response) => {\n operation.setContext({ response });\n const ctype = response.headers?.get(\"content-type\");\n\n if (ctype !== null && /^multipart\\/mixed/i.test(ctype)) {\n return readMultipartBody(response, observerNext);\n } else {\n return parseAndCheckHttpResponse(operation)(response).then(\n observerNext\n );\n }\n })\n .then(() => {\n controller = undefined;\n observer.complete();\n })\n .catch((err) => {\n controller = undefined;\n handleError(err, observer);\n });\n\n return () => {\n // XXX support canceling this request\n // https://developers.google.com/web/updates/2017/09/abortable-fetch\n if (controller) controller.abort();\n };\n });\n });\n};\n"]} |