My API response body seems to be truncated?

Question content

This is my first time getting involved in GO, and the API I use to get stock prices accepts multiple tickers (think stock IDs; NVDA => Nvidia) to reduce my limited API calls. However, when trying to get multiple codes, the body seems to be cut off:

{
    "meta ": {
        "requested ": 2,
        "returned ": 2
    },
    "data ": [
        {
            "ticker ": "MSFT ",
            "name ": "Microsoft Corporation ",
            "exchange_short ": null,
            "exchange_long ": null,
            "mic_code ": "IEXG ",
            "currency ": "USD ",
            "price ": 374.72,
            "day_high ": 376.92,
            "day_low ": 373.54,
            "day_open ": 374.94,
            "52_week_high ": 349.84,
            "52_week_low ": 213.43,
            "market_cap ": null,
            "previous_close_price ": 374.58,
            "previous_close_price_time ": "2023-12-22T15:59:56.000000 ",
            "day_change ": 0.04,
            "volume ": 165558,
            "is_extended_hours_price ": false,
            "last_trade_time ": "2023-12-26T16:00:00.000000 "
        },
        {
            "ticker ": ""

Exact calls to the Stock API directly in Postman return:

{
    "meta": {
        "requested": 2,
        "returned": 2
    },
    "data": [
        {
            "ticker": "MSFT",
            "name": "Microsoft Corporation",
            "exchange_short": null,
            "exchange_long": null,
            "mic_code": "IEXG",
            "currency": "USD",
            "price": 374.72,
            "day_high": 376.92,
            "day_low": 373.54,
            "day_open": 374.94,
            "52_week_high": 349.84,
            "52_week_low": 213.43,
            "market_cap": null,
            "previous_close_price": 374.58,
            "previous_close_price_time": "2023-12-22T15:59:56.000000",
            "day_change": 0.04,
            "volume": 165558,
            "is_extended_hours_price": false,
            "last_trade_time": "2023-12-26T16:00:00.000000"
        },
        {
            "ticker": "PLTR",
            "name": "Palantir Technologies Inc",
            "exchange_short": null,
            "exchange_long": null,
            "mic_code": "IEXG",
            "currency": "USD",
            "price": 17.68,
            "day_high": 17.75,
            "day_low": 17.34,
            "day_open": 17.45,
            "52_week_high": 17.16,
            "52_week_low": 5.92,
            "market_cap": null,
            "previous_close_price": 17.42,
            "previous_close_price_time": "2023-12-22T15:59:56.000000",
            "day_change": 1.47,
            "volume": 236201,
            "is_extended_hours_price": false,
            "last_trade_time": "2023-12-26T15:59:58.000000"
        }
    ]
}

I think I did something wrong (I had never touched GO before yesterday) The relevant codes are as follows:

func getStockPriceData(ticker string) []Stock {
    baseURL, _ := url.Parse("https://api.stockdata.org")

    baseURL.Path += "v1/data/quote"

    params := url.Values{}
    params.Add("symbols", ticker)
    params.Add("api_token", apiToken.ApiToken)

    baseURL.RawQuery = params.Encode()

    req, _ := http.NewRequest("GET", baseURL.String(), nil)

    res, _ := http.DefaultClient.Do(req)

    defer res.Body.Close()

    body, err := io.ReadAll(res.Body)
    if err != nil {
        panic(err.Error())
    }

    apiResponseData := ApiResponseStockData{}

    //json.NewDecoder(res.Body).Decode(&apiResponseData)
    err2 := json.Unmarshal(body, &apiResponseData)
    if err2 != nil {
        fmt.Println("whoops:", err2)
    }

    stocks := []Stock{}
    for _, data := range apiResponseData.ResponseStockData {
        stock := Stock{}
        stock.Name = data.Name
        stock.Ticker = data.Ticker
        stock.Price = data.Price
        stock.DayHigh = data.DayHigh
        stock.DayLow = data.DayLow
        stock.DayOpen = data.DayOpen
        stock.PreviousClosePrice = data.PreviousClosePrice
        stock.DayChange = data.DayChange
        stocks = append(stocks, stock)
    }
    return stocks
}

Context structure:

type Stock struct {
    Name               string  `json:"name"`
    Ticker             string  `json:"ticker"`
    Price              float64 `json:"price"`
    DayHigh            float64 `json:"day_high"`
    DayLow             float64 `json:"day_low"`
    DayOpen            float64 `json:"day_open"`
    DayChange          float64 `json:"day_change"`
    PreviousClosePrice float64 `json:"previous_close_price"`
}

type ApiResponseStockData struct {
    ResponseStockData []ResponseData `json:"data"`
}

type ResponseData struct {
    Name                 string    `json:"name"`
    Ticker               string    `json:"ticker"`
    ExchangeShort        bool      `json:"exchange_short"`
    ExchangeLong         bool      `json:"exchange_long"`
    MicCode              string    `json:"mic_code"`
    Currency             string    `json:"currency"`
    Price                float64   `json:"price"`
    DayHigh              float64   `json:"day_high"`
    DayLow               float64   `json:"day_low"`
    DayOpen              float64   `json:"day_open"`
    DayChange            float64   `json:"day_change"`
    YearHigh             float64   `json:"52_week_high"`
    YearLow              float64   `json:"52_week_low"`
    MarketCap            float64   `json:"market_cap"`
    PreviousClosePrice   float64   `json:"previous_close_price"`
    PreviousCloseTime    time.Time `json:"previous_close_time"`
    Volume               float64   `json:"volume"`
    IsExtendedHoursPrice bool      `json:"is_extended_hours_price"`
    LastTradeTime        time.Time `json:"last_trade_time"`
}

After looking at a few threads, I tried using json.Unmarshal and json.NewDecoder().Decode() but still no luck. The cutoff string above is from the body, which successfully adds a single complete object to the apiResponseData when using Decode or Unmarshal. I can understand if this is a huge response, but this seems so simple that I have to assume I'm making a very obvious rookie mistake.

Any help would be greatly appreciated.

Correct Answer

You are trying to parse a time string using a format that contains a time zone offset ("Z07:00").

You need to adjust the time layout to the following.

layout := "2006-01-02T15:04:05.000000"

Your error handling is incorrect, that's why you are also able to exit with an incorrect response.

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