请求JSON时未收到任何响应。

huangapple
go评论86阅读模式
英文:

No Body received when requesting JSON

问题

我正在为您翻译以下内容：

我正在尝试从https://fantasy.premierleague.com/api/bootstrap-static/下载一个json文件。

在Postman或浏览器中，它可以正常工作，并返回一个JSON对象，但是当我尝试使用自己的golang程序或者Postman示例时，请求体为空。我可以看到返回了200响应，但没有返回体。

有什么指导可以解释为什么在Postman中可以工作，但在golang代码片段中不行吗？

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"time"
)

type dataobject struct {
	Events []struct {
		ID                     int       `json:"id"`
		Name                   string    `json:"name"`
		DeadlineTime           time.Time `json:"deadline_time"`
		AverageEntryScore      int       `json:"average_entry_score"`
		Finished               bool      `json:"finished"`
		DataChecked            bool      `json:"data_checked"`
		HighestScoringEntry    int       `json:"highest_scoring_entry"`
		DeadlineTimeEpoch      int       `json:"deadline_time_epoch"`
		DeadlineTimeGameOffset int       `json:"deadline_time_game_offset"`
		HighestScore           int       `json:"highest_score"`
		IsPrevious             bool      `json:"is_previous"`
		IsCurrent              bool      `json:"is_current"`
		IsNext                 bool      `json:"is_next"`
		ChipPlays              []struct {
			ChipName  string `json:"chip_name"`
			NumPlayed int    `json:"num_played"`
		} `json:"chip_plays"`
		MostSelected      int `json:"most_selected"`
		MostTransferredIn int `json:"most_transferred_in"`
		TopElement        int `json:"top_element"`
		TopElementInfo    struct {
			ID     int `json:"id"`
			Points int `json:"points"`
		} `json:"top_element_info"`
		TransfersMade     int `json:"transfers_made"`
		MostCaptained     int `json:"most_captained"`
		MostViceCaptained int `json:"most_vice_captained"`
	} `json:"events"`
	GameSettings struct {
		LeagueJoinPrivateMax         int           `json:"league_join_private_max"`
		LeagueJoinPublicMax          int           `json:"league_join_public_max"`
		LeagueMaxSizePublicClassic   int           `json:"league_max_size_public_classic"`
		LeagueMaxSizePublicH2H       int           `json:"league_max_size_public_h2h"`
		LeagueMaxSizePrivateH2H      int           `json:"league_max_size_private_h2h"`
		LeagueMaxKoRoundsPrivateH2H  int           `json:"league_max_ko_rounds_private_h2h"`
		LeaguePrefixPublic           string        `json:"league_prefix_public"`
		LeaguePointsH2HWin           int           `json:"league_points_h2h_win"`
		LeaguePointsH2HLose          int           `json:"league_points_h2h_lose"`
		LeaguePointsH2HDraw          int           `json:"league_points_h2h_draw"`
		LeagueKoFirstInsteadOfRandom bool          `json:"league_ko_first_instead_of_random"`
		CupStartEventID              int           `json:"cup_start_event_id"`
		CupStopEventID               int           `json:"cup_stop_event_id"`
		CupQualifyingMethod          string        `json:"cup_qualifying_method"`
		CupType                      string        `json:"cup_type"`
		SquadSquadplay               int           `json:"squad_squadplay"`
		SquadSquadsize               int           `json:"squad_squadsize"`
		SquadTeamLimit               int           `json:"squad_team_limit"`
		SquadTotalSpend              int           `json:"squad_total_spend"`
		UICurrencyMultiplier         int           `json:"ui_currency_multiplier"`
		UIUseSpecialShirts           bool          `json:"ui_use_special_shirts"`
		UISpecialShirtExclusions     []interface{} `json:"ui_special_shirt_exclusions"`
		StatsFormDays                int           `json:"stats_form_days"`
		SysViceCaptainEnabled        bool          `json:"sys_vice_captain_enabled"`
		TransfersCap                 int           `json:"transfers_cap"`
		TransfersSellOnFee           float64       `json:"transfers_sell_on_fee"`
		LeagueH2HTiebreakStats       []string      `json:"league_h2h_tiebreak_stats"`
		Timezone                     string        `json:"timezone"`
	} `json:"game_settings"`
	Phases []struct {
		ID         int    `json:"id"`
		Name       string `json:"name"`
		StartEvent int    `json:"start_event"`
		StopEvent  int    `json:"stop_event"`
	} `json:"phases"`
	Teams []struct {
		Code                int         `json:"code"`
		Draw                int         `json:"draw"`
		Form                interface{} `json:"form"`
		ID                  int         `json:"id"`
		Loss                int         `json:"loss"`
		Name                string      `json:"name"`
		Played              int         `json:"played"`
		Points              int         `json:"points"`
		Position            int         `json:"position"`
		ShortName           string      `json:"short_name"`
		Strength            int         `json:"strength"`
		TeamDivision        interface{} `json:"team_division"`
		Unavailable         bool        `json:"unavailable"`
		Win                 int         `json:"win"`
		StrengthOverallHome int         `json:"strength_overall_home"`
		StrengthOverallAway int         `json:"strength_overall_away"`
		StrengthAttackHome  int         `json:"strength_attack_home"`
		StrengthAttackAway  int         `json:"strength_attack_away"`
		StrengthDefenceHome int         `json:"strength_defence_home"`
		StrengthDefenceAway int         `json:"strength_defence_away"`
		PulseID             int         `json:"pulse_id"`
	} `json:"teams"`
	TotalPlayers int `json:"total_players"`
	Elements     []struct {
		ChanceOfPlayingNextRound         interface{} `json:"chance_of_playing_next_round"`
		ChanceOfPlayingThisRound         interface{} `json:"chance_of_playing_this_round"`
		Code                             int         `json:"code"`
		CostChangeEvent                  int         `json:"cost_change_event"`
		CostChangeEventFall              int         `json:"cost_change_event_fall"`
		CostChangeStart                  int         `json:"cost_change_start"`
		CostChangeStartFall              int         `json:"cost_change_start_fall"`
		DreamteamCount                   int         `json:"dreamteam_count"`
		ElementType                      int         `json:"element_type"`
		EpNext                           string      `json:"ep_next"`
		EpThis                           string      `json:"ep_this"`
		EventPoints                      int         `json:"event_points"`
		FirstName                        string      `json:"first_name"`
		Form                             string      `json:"form"`
		ID                               int         `json:"id"`
		InDreamteam                      bool        `json:"in_dreamteam"`
		News                             string      `json:"news"`
		NewsAdded                        interface{} `json:"news_added"`
		NowCost                          int         `json:"now_cost"`
		Photo                            string      `json:"photo"`
		PointsPerGame                    string      `json:"points_per_game"`
		SecondName                       string      `json:"second_name"`
		SelectedByPercent                string      `json:"selected_by_percent"`
		Special                          bool        `json:"special"`
		SquadNumber                      interface{} `json:"squad_number"`
		Status                           string      `json:"status"`
		Team                             int         `json:"team"`
		TeamCode                         int         `json:"team_code"`
		TotalPoints                      int         `json:"total_points"`
		TransfersIn                      int         `json:"transfers_in"`
		TransfersInEvent                 int         `json:"transfers_in_event"`
		TransfersOut                     int         `json:"transfers_out"`
		TransfersOutEvent                int         `json:"transfers_out_event"`
		ValueForm                        string      `json:"value_form"`
		ValueSeason                      string      `json:"value_season"`
		WebName                          string      `json:"web_name"`
		Minutes                          int         `json:"minutes"`
		GoalsScored                      int         `json:"goals_scored"`
		Assists                          int         `json:"assists"`
		CleanSheets                      int         `json:"clean_sheets"`
		GoalsConceded                    int         `json:"goals_conceded"`
		OwnGoals                         int         `json:"own_goals"`
		PenaltiesSaved                   int         `json:"penalties_saved"`
		PenaltiesMissed                  int         `json:"penalties_missed"`
		YellowCards                      int         `json:"yellow_cards"`
		RedCards                         int         `json:"red_cards"`
		Saves                            int         `json:"saves"`
		Bonus                            int         `json:"bonus"`
		Bps                              int         `json:"bps"`
		Influence                        string      `json:"influence"`
		Creativity                       string      `json:"creativity"`
		Threat                           string      `json:"threat"`
		IctIndex                         string      `json:"ict_index"`
		InfluenceRank                    int         `json:"influence_rank"`
		InfluenceRankType                int         `json:"influence_rank_type"`
		CreativityRank                   int         `json:"creativity_rank"`
		CreativityRankType               int         `json:"creativity_rank_type"`
		ThreatRank                       int         `json:"threat_rank"`
		ThreatRankType                   int         `json:"threat_rank_type"`
		IctIndexRank                     int         `json:"ict_index_rank"`
		IctIndexRankType                 int         `json:"ict_index_rank_type"`
		CornersAndIndirectFreekicksOrder interface{} `json:"corners_and_indirect_freekicks_order"`
		CornersAndIndirectFreekicksText  string      `json:"corners_and_indirect_freekicks_text"`
		DirectFreekicksOrder             interface{} `json:"direct_freekicks_order"`
		DirectFreekicksText              string      `json:"direct_freekicks_text"`
		PenaltiesOrder                   interface{} `json:"penalties_order"`
		PenaltiesText                    string      `json:"penalties_text"`
	} `json:"elements"`
	ElementStats []struct {
		Label string `json:"label"`
		Name  string `json:"name"`
	} `json:"element_stats"`
	ElementTypes []struct {
		ID                 int    `json:"id"`
		PluralName         string `json:"plural_name"`
		PluralNameShort    string `json:"plural_name_short"`
		SingularName       string `json:"singular_name"`
		SingularNameShort  string `json:"singular_name_short"`
		SquadSelect        int    `json:"squad_select"`
		SquadMinPlay       int    `json:"squad_min_play"`
		SquadMaxPlay       int    `json:"squad_max_play"`
		UIShirtSpecific    bool   `json:"ui_shirt_specific"`
		SubPositionsLocked []int  `json:"sub_positions_locked"`
		ElementCount       int    `json:"element_count"`
	} `json:"element_types"`
}

func main() {
	fmt.Println("Starting EDL-Draft")

	url := "https://fantasy.premierleague.com/api/bootstrap-static/"
	method := "GET"

	client := &http.Client{}
	req, err := http.NewRequest(method, url, nil)

	if err != nil {
		fmt.Println(err)
		return
	}
	res, err := client.Do(req)
	if err != nil {
		fmt.Println(err)
		return
	}
	defer res.Body.Close()

	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(string(body))

	var result dataobject
	if err := json.Unmarshal(body, &result); err != nil {
		fmt.Println("Can not unmarshal JSON")
	}

	fmt.Println("Finishing EPL-Draft")
}

请求JSON时未收到任何响应。

英文:

I'm trying to download a json file from https://fantasy.premierleague.com/api/bootstrap-static/

It works perfectly fine in postman, or the browser and i get a JSON object, but when i try in golang with either my own program or the postman example the request body is empty. I can see that it was a 200 response but no body.

Any pointers as to why it's working in postman, but not in the golang snippet?

package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"time"
)
type dataobject struct {
Events []struct {
ID                     int       `json:"id"`
Name                   string    `json:"name"`
DeadlineTime           time.Time `json:"deadline_time"`
AverageEntryScore      int       `json:"average_entry_score"`
Finished               bool      `json:"finished"`
DataChecked            bool      `json:"data_checked"`
HighestScoringEntry    int       `json:"highest_scoring_entry"`
DeadlineTimeEpoch      int       `json:"deadline_time_epoch"`
DeadlineTimeGameOffset int       `json:"deadline_time_game_offset"`
HighestScore           int       `json:"highest_score"`
IsPrevious             bool      `json:"is_previous"`
IsCurrent              bool      `json:"is_current"`
IsNext                 bool      `json:"is_next"`
ChipPlays              []struct {
ChipName  string `json:"chip_name"`
NumPlayed int    `json:"num_played"`
} `json:"chip_plays"`
MostSelected      int `json:"most_selected"`
MostTransferredIn int `json:"most_transferred_in"`
TopElement        int `json:"top_element"`
TopElementInfo    struct {
ID     int `json:"id"`
Points int `json:"points"`
} `json:"top_element_info"`
TransfersMade     int `json:"transfers_made"`
MostCaptained     int `json:"most_captained"`
MostViceCaptained int `json:"most_vice_captained"`
} `json:"events"`
GameSettings struct {
LeagueJoinPrivateMax         int           `json:"league_join_private_max"`
LeagueJoinPublicMax          int           `json:"league_join_public_max"`
LeagueMaxSizePublicClassic   int           `json:"league_max_size_public_classic"`
LeagueMaxSizePublicH2H       int           `json:"league_max_size_public_h2h"`
LeagueMaxSizePrivateH2H      int           `json:"league_max_size_private_h2h"`
LeagueMaxKoRoundsPrivateH2H  int           `json:"league_max_ko_rounds_private_h2h"`
LeaguePrefixPublic           string        `json:"league_prefix_public"`
LeaguePointsH2HWin           int           `json:"league_points_h2h_win"`
LeaguePointsH2HLose          int           `json:"league_points_h2h_lose"`
LeaguePointsH2HDraw          int           `json:"league_points_h2h_draw"`
LeagueKoFirstInsteadOfRandom bool          `json:"league_ko_first_instead_of_random"`
CupStartEventID              int           `json:"cup_start_event_id"`
CupStopEventID               int           `json:"cup_stop_event_id"`
CupQualifyingMethod          string        `json:"cup_qualifying_method"`
CupType                      string        `json:"cup_type"`
SquadSquadplay               int           `json:"squad_squadplay"`
SquadSquadsize               int           `json:"squad_squadsize"`
SquadTeamLimit               int           `json:"squad_team_limit"`
SquadTotalSpend              int           `json:"squad_total_spend"`
UICurrencyMultiplier         int           `json:"ui_currency_multiplier"`
UIUseSpecialShirts           bool          `json:"ui_use_special_shirts"`
UISpecialShirtExclusions     []interface{} `json:"ui_special_shirt_exclusions"`
StatsFormDays                int           `json:"stats_form_days"`
SysViceCaptainEnabled        bool          `json:"sys_vice_captain_enabled"`
TransfersCap                 int           `json:"transfers_cap"`
TransfersSellOnFee           float64       `json:"transfers_sell_on_fee"`
LeagueH2HTiebreakStats       []string      `json:"league_h2h_tiebreak_stats"`
Timezone                     string        `json:"timezone"`
} `json:"game_settings"`
Phases []struct {
ID         int    `json:"id"`
Name       string `json:"name"`
StartEvent int    `json:"start_event"`
StopEvent  int    `json:"stop_event"`
} `json:"phases"`
Teams []struct {
Code                int         `json:"code"`
Draw                int         `json:"draw"`
Form                interface{} `json:"form"`
ID                  int         `json:"id"`
Loss                int         `json:"loss"`
Name                string      `json:"name"`
Played              int         `json:"played"`
Points              int         `json:"points"`
Position            int         `json:"position"`
ShortName           string      `json:"short_name"`
Strength            int         `json:"strength"`
TeamDivision        interface{} `json:"team_division"`
Unavailable         bool        `json:"unavailable"`
Win                 int         `json:"win"`
StrengthOverallHome int         `json:"strength_overall_home"`
StrengthOverallAway int         `json:"strength_overall_away"`
StrengthAttackHome  int         `json:"strength_attack_home"`
StrengthAttackAway  int         `json:"strength_attack_away"`
StrengthDefenceHome int         `json:"strength_defence_home"`
StrengthDefenceAway int         `json:"strength_defence_away"`
PulseID             int         `json:"pulse_id"`
} `json:"teams"`
TotalPlayers int `json:"total_players"`
Elements     []struct {
ChanceOfPlayingNextRound         interface{} `json:"chance_of_playing_next_round"`
ChanceOfPlayingThisRound         interface{} `json:"chance_of_playing_this_round"`
Code                             int         `json:"code"`
CostChangeEvent                  int         `json:"cost_change_event"`
CostChangeEventFall              int         `json:"cost_change_event_fall"`
CostChangeStart                  int         `json:"cost_change_start"`
CostChangeStartFall              int         `json:"cost_change_start_fall"`
DreamteamCount                   int         `json:"dreamteam_count"`
ElementType                      int         `json:"element_type"`
EpNext                           string      `json:"ep_next"`
EpThis                           string      `json:"ep_this"`
EventPoints                      int         `json:"event_points"`
FirstName                        string      `json:"first_name"`
Form                             string      `json:"form"`
ID                               int         `json:"id"`
InDreamteam                      bool        `json:"in_dreamteam"`
News                             string      `json:"news"`
NewsAdded                        interface{} `json:"news_added"`
NowCost                          int         `json:"now_cost"`
Photo                            string      `json:"photo"`
PointsPerGame                    string      `json:"points_per_game"`
SecondName                       string      `json:"second_name"`
SelectedByPercent                string      `json:"selected_by_percent"`
Special                          bool        `json:"special"`
SquadNumber                      interface{} `json:"squad_number"`
Status                           string      `json:"status"`
Team                             int         `json:"team"`
TeamCode                         int         `json:"team_code"`
TotalPoints                      int         `json:"total_points"`
TransfersIn                      int         `json:"transfers_in"`
TransfersInEvent                 int         `json:"transfers_in_event"`
TransfersOut                     int         `json:"transfers_out"`
TransfersOutEvent                int         `json:"transfers_out_event"`
ValueForm                        string      `json:"value_form"`
ValueSeason                      string      `json:"value_season"`
WebName                          string      `json:"web_name"`
Minutes                          int         `json:"minutes"`
GoalsScored                      int         `json:"goals_scored"`
Assists                          int         `json:"assists"`
CleanSheets                      int         `json:"clean_sheets"`
GoalsConceded                    int         `json:"goals_conceded"`
OwnGoals                         int         `json:"own_goals"`
PenaltiesSaved                   int         `json:"penalties_saved"`
PenaltiesMissed                  int         `json:"penalties_missed"`
YellowCards                      int         `json:"yellow_cards"`
RedCards                         int         `json:"red_cards"`
Saves                            int         `json:"saves"`
Bonus                            int         `json:"bonus"`
Bps                              int         `json:"bps"`
Influence                        string      `json:"influence"`
Creativity                       string      `json:"creativity"`
Threat                           string      `json:"threat"`
IctIndex                         string      `json:"ict_index"`
InfluenceRank                    int         `json:"influence_rank"`
InfluenceRankType                int         `json:"influence_rank_type"`
CreativityRank                   int         `json:"creativity_rank"`
CreativityRankType               int         `json:"creativity_rank_type"`
ThreatRank                       int         `json:"threat_rank"`
ThreatRankType                   int         `json:"threat_rank_type"`
IctIndexRank                     int         `json:"ict_index_rank"`
IctIndexRankType                 int         `json:"ict_index_rank_type"`
CornersAndIndirectFreekicksOrder interface{} `json:"corners_and_indirect_freekicks_order"`
CornersAndIndirectFreekicksText  string      `json:"corners_and_indirect_freekicks_text"`
DirectFreekicksOrder             interface{} `json:"direct_freekicks_order"`
DirectFreekicksText              string      `json:"direct_freekicks_text"`
PenaltiesOrder                   interface{} `json:"penalties_order"`
PenaltiesText                    string      `json:"penalties_text"`
} `json:"elements"`
ElementStats []struct {
Label string `json:"label"`
Name  string `json:"name"`
} `json:"element_stats"`
ElementTypes []struct {
ID                 int    `json:"id"`
PluralName         string `json:"plural_name"`
PluralNameShort    string `json:"plural_name_short"`
SingularName       string `json:"singular_name"`
SingularNameShort  string `json:"singular_name_short"`
SquadSelect        int    `json:"squad_select"`
SquadMinPlay       int    `json:"squad_min_play"`
SquadMaxPlay       int    `json:"squad_max_play"`
UIShirtSpecific    bool   `json:"ui_shirt_specific"`
SubPositionsLocked []int  `json:"sub_positions_locked"`
ElementCount       int    `json:"element_count"`
} `json:"element_types"`
}
func main() {
fmt.Println("Starting EDL-Draft")
url := "https://fantasy.premierleague.com/api/bootstrap-static/"
method := "GET"
client := &http.Client {
}
req, err := http.NewRequest(method, url, nil)
if err != nil {
fmt.Println(err)
return
}
res, err := client.Do(req)
if err != nil {
fmt.Println(err)
return
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
if err != nil {
fmt.Println(err)
return
}
fmt.Println(string(body))
var result dataobject
if err := json.Unmarshal(body, &result); err != nil {  
fmt.Println("Can not unmarshal JSON")
}
fmt.Println("Finishing EPL-Draft")
}

请求JSON时未收到任何响应。

答案1

得分: 1

只需添加一个User-Agent请求头：req.Header.Set("User-Agent", "xxx")

没有看到文档，我不确定为什么要这样做，但是似乎可以使用任意值。

英文:

Simply add a User-Agent request header: req.Header.Set("User-Agent", "xxx")

Without seeing the docs, I'm not sure why this is, but any arbitrary value seems to do.

huangapple
  • 本文由 发表于 2021年9月29日 05:36:55
  • 转载请务必保留本文链接：https://go.coder-hub.com/69368744.html
  • go
  • http
  • json
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