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unit UnitJoursFeries;
interface
uses
Winapi.Windows, Winapi.Messages, Wininet, System.Math,
System.SysUtils, System.Variants, System.Classes, System.JSON, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, IdBaseComponent,
IdComponent, IdTCPConnection, IdTCPClient, IdHTTP, IdIOHandler, IdURI,
IdIOHandlerStream, IPPeerClient, Data.Bind.Components, Data.Bind.ObjectScope,
REST.Client, IdIOHandlerSocket, IdIOHandlerStack, IdSSL, IdSSLOpenSSL,
Vcl.Grids, Vcl.ValEdit, System.DateUtils;
type
TOnGetJourFerie = reference to procedure(Nom: string; Jour: TDate);
procedure GetJourFeries(OnGetJourFerie: TOnGetJourFerie; AnneeDebut, AnneeFin: Integer);
procedure GetJourFeriesAvecSSL(OnGetJourFerie: TOnGetJourFerie);
implementation
const
API = 'https://calendrier.api.gouv.fr/jours-feries/%s.json';
Zones: array [0 .. 12] of string = (
'alsace-moselle', 'guadeloupe', 'guyane', 'la-reunion', 'martinique',
'mayotte', 'metropole', 'nouvelle-caledonie', 'polynesie-francaise',
'saint-barthelemy', 'saint-martin', 'saint-pierre-et-miquelon', 'wallis-et-futuna');
{$REGION 'AVEC dépendance à OpenSSL'}
/// <summary>
/// Nécessite libeay32.dll et ssleay32.dll version 1.0.2.11 ou plus
/// </summary>
procedure DownloadHTTP(const AUrl: string; out DestStream: TStream);
function IsHTTPS(const AUrl: string): Boolean;
begin
with TIdURI.Create(AUrl) do
try
Result := SameText(Protocol, 'HTTPS');
finally
Free;
end;
end;
begin
with TIdHTTP.Create(Application) do
try
if IsHTTPS(AUrl) then
begin
IOHandler := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
TIdSSLIOHandlerSocketOpenSSL(IOHandler).SSLOptions.Method := sslvSSLv23;
// la valeur sslvSSLv23 laisse au server le choix du protocole, on ne s'en occupe pas
end;
try
Get(AUrl, DestStream);
except
on e: Exception do
MessageDlg(Format('Erreur : %s', [e.Message]), mtInformation, [mbOK], 0);
end;
finally
IOHandler.Free;
Free;
end;
end;
procedure GetJourFeriesAvecSSL(OnGetJourFerie: TOnGetJourFerie);
begin
end;
{$ENDREGION 'AVEC dépendance à OpenSSL'}
{$REGION 'SANS dépendance à OpenSSL'}
procedure GetInternetFile(const AServerName: string; const AUrl: string; AStream: TStream;
const ExpectedContentType: string = '');
type
TAcceptTypes = packed array [0 .. 1] of LPWSTR;
const
BufferSize = 1024;
ACCEPT_TYPES: TAcceptTypes = (PChar('text/*'), nil); // PCTSTR rgpszAcceptTypes[] = {_T(?text/*?), NULL};
var
hSession, hHTTP, hReq: HINTERNET;
Accept : TAcceptTypes;
Buffer : array [1 .. BufferSize] of Byte;
BufferLen : DWORD;
sAppName : string;
begin
AStream.Size := 0;
sAppName := ExtractFileName(Application.ExeName);
Accept := ACCEPT_TYPES;
if ExpectedContentType <> '' then
Accept[0] := PChar(ExpectedContentType);
// Winapi.WinInet !!!
hSession := InternetOpen(PChar(sAppName), INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
try
hHTTP := InternetConnect(hSession, PChar(AServerName), INTERNET_DEFAULT_HTTP_PORT, nil, nil,
INTERNET_SERVICE_HTTP, 0, 1);
try
hReq := HttpOpenRequest(hHTTP, PChar('GET'), PChar(AUrl), nil, nil, @Accept, 0, 1);
try
if HttpSendRequest(hReq, nil, 0, nil, 0) then
begin
BufferLen := 0;
repeat
if InternetReadFile(hReq, @Buffer, BufferSize, BufferLen) then
AStream.WriteBuffer(Buffer, BufferLen);
until BufferLen = 0;
end
else
raise Exception.Create('HttpOpenRequest failed. ' + SysErrorMessage(GetLastError));
finally
InternetCloseHandle(hReq);
end;
finally
InternetCloseHandle(hHTTP);
end;
finally
InternetCloseHandle(hSession);
end;
end;
procedure GetJourFeries(OnGetJourFerie: TOnGetJourFerie; AnneeDebut, AnneeFin: Integer);
var
JSONStream : TStringStream;
ResponseJSON: TJSONObject;
Pair : TJSONPair;
DateStr : string;
Dts : TArray<string>;
DateDte : TDate;
Annee : Word;
begin
JSONStream := TStringStream.Create('', TEncoding.UTF8);
try
GetInternetFile('calendrier.api.gouv.fr', '/jours-feries/metropole.json', JSONStream, 'application/json');
ResponseJSON := TJSONObject.ParseJSONValue(JSONStream.DataString) as TJSONObject; // UTF8 !
try
for Pair in ResponseJSON do
begin
DateStr := Pair.JsonString.Value;
Dts := DateStr.Split(['-']);
Annee := Dts[0].ToInteger;
if InRange(Annee, AnneeDebut, AnneeFin) then
begin
DateDte := System.DateUtils.EncodeDateTime(Annee, Dts[1].ToInteger, Dts[2].ToInteger, 0, 0, 0, 0);
OnGetJourFerie(Pair.JsonValue.Value, DateDte);
end;
end;
finally
ResponseJSON.Free();
end;
finally
JSONStream.Free();
end;
end;
{$ENDREGION 'SANS dépendance à OpenSSL'}
end. |
