Delphi RESTClient parsing JSON - json

Question

I use TRESTClient, TRESTRequest, FRESTResponse and RESTResponseDataSetAdapter like in RESTDebugger (Delphi Tokyo) and it works fine but for one JSONValue the webservice send me some HTML mix and It do not display the right thing in my TFDMemTable.
I make the same test with JSONViewer and it make the same things
Is there a way to modify my JSONStream just before it start to parse my RestReponse ?
Why it don't display all my JSONString for dev_msg_attention_to_garage ?
{"id_commande":"15672","id_devis":"16347","status":"CONFIRM","res_codres":"IDG","nom_client":"TESTRDV","prenom_client":"toto","mail":"test#test.fr","tel_port":"0606060606","date_prise_rdv":"2017-09-25 09:25:43.281269","date_rdv":"2017-09-27","heure_rdv":"17:30-18:00","immatriculation":"EC620XP ","type_prestation":"FREINAGE","famille":"Disques et plaquettes avant","type_mine":"","codmar":"PEUG","numord":"9938","marque":"PEUGEOT","marque_modele":"PEUGEOT 206 1.1 60CV","cnit":"MPE1002K6315","aaa_caliloca":null,"aaa_cape":null,"aaa_ccreditbail":null,"aaa_canton":null,"aaa_carrosserie":"BERLINE","aaa_carrosseriecg":"CI","aaa_catclient":null,"aaa_catclientvo":null,"aaa_catvendeur":null,"aaa_co2":"154","aaa_codifvin":"VF32AHFZE40061368","aaa_consexurb":"5.1","aaa_consmixte":"6.2","aaa_consurb":"8.2","aaa_couleurvehic":"MARRON","aaa_cstrvincg":null,"aaa_cylindree":"1124","aaa_date1ercir":"1998-10-15","aaa_datedcg":"2016-06-09","aaa_datedcgachat":null,"aaa_datedcgpr":null,"aaa_datedcgprachat":null,"aaa_depart":null,"aaa_departement":null,"aaa_depollution":"NON","aaa_empat":"245.0","aaa_empreintesol":null,"aaa_energie":"ESSENCE","aaa_gammemarche":null,"aaa_genrev":"VP","aaa_genrevcg":"VP","aaa_hauteur":"144","aaa_immatsiv":"EC620XP","aaa_largeur":"165","aaa_longueur":"384","aaa_marque":"PEUGEOT","aaa_marquecarros":"PEUGEOT","aaa_modeinject":"AUTR. CARBURATIONS","aaa_moderefroid":null,"aaa_modele":"206","aaa_modeleetude":"206","aaa_modeleprf":"206","aaa_mouvmt":null,"aaa_nserie":"40061368","aaa_nsiren":"000000000","aaa_nbcylind":"4","aaa_nbdecibels":null,"aaa_nbmain":null,"aaa_nbplass":"5","aaa_nbportes":"5","aaa_nbpropriet":null,"aaa_nbsoupape":"2","aaa_nbvitesse":"5","aaa_nbvolume":"2","aaa_nuancecouleur":null,"aaa_poidsvide":"910","aaa_prixvehic":"0","aaa_propulsion":"AVANT","aaa_ptr":"1405","aaa_ptrprf":"0192","aaa_puisch":"60","aaa_puisfisc":"5","aaa_rappuispoids":null,"aaa_regionadmin":null,"aaa_regmdecibels":null,"aaa_statutimmat":null,"aaa_temoincession":null,"aaa_tpboitevit":"MECANIQUE","aaa_transmiss":null,"aaa_turbocompr":"NON TURBO","aaa_type":"MPE1002K6315","aaa_typevincg":"2AHFZE","aaa_version":"XR\/PRESE","aaa_voiear":null,"aaa_voieav":null,"aaa_datews":"2017-06-16","aaa_3lnom":"fff","veh_codmar":null,"veh_numord":null,"veh_ktypenr":null,"aaa_pneus":"175\/65 R14 82 T, 165\/70 R13 79 T","aaa_typevarversprf":"2AHFZE","aaa_codemoteur":"HFZ","aaa_puiskw":"44","total_ht":"141.58","total_tva":"28.32","total_ttc":"169.90","total_ttc_max":"169.90","total_ttc_min":"169.90","dev_msg_attention_to_garage":" \r\n \r\n \r\n attention\r\n \r\n ATTENTION Pour ce rendez-vous web nous avons identifié\r\n plusieurs références constructeur possible :<\/br\/>\r\n 4249A5, <b>424995<\/b><br\/> \r\n <br \/>Vous devez vous assurer que la\r\n référence indiquée correspond bien à\r\n celle montée sur le véhicule du client <br \/>Le\r\n prix final à payer par le client doit être de 169,90 \u20AC TTC \r\n \r\n \r\n\t\r\n \/ Le devis est en pi\u00E8ce budget","dev_msg_from_customer":"test message;\r\n","id":"15672","created_at":"2017-09-25 09:25:43.460187","updated_at":"2017-09-25 09:26:10.621387","coupon":[],"promotion_globale":[],"lignes_pieces":[{"codfam":"FDI","ssfam":"AV","designation_piece":"DISQUE DE FREIN AV PLEIN. DIAMETRE= 247X10MM","ref_constructeur":"424995","quantity":"2.00","remise":"0.00","pu":"0.00","taux_tva":null},{"codfam":"FPL","ssfam":"AV","designation_piece":"PLAQUETTES DE FREIN AV. MONTAGE BOSCH","ref_constructeur":"425320","quantity":"1.00","remise":"0.00","pu":"0.00","taux_tva":null}],"lignes_mo":[{"type_ligne":"FOI","designation_mo":"Forfait Isotech ","ref_operation_adauto":"FISOAD16990","quantity":"1.00","taux_horaire":"141.58","remise":null,"code_taux_horaire":null,"taux_tva":1.2,"montant_ht_ligne_apres_remise":141.58}],"deduction_rdv_en_ligne_ttc":"16.99","montant_a_regler_par_client":152.91,"pourcentage_remise_calculee_pieces":0,"total_remises":0,"total_ht_avant_remises":141.58,"pourcentage_remises":0,"pourcentage_remise_calculee_mo":0}

Answer 1

You are being presented with a limitation of Windows' Tree View. From the documentation:
Note that although the tree-view control allows any length string to be stored as item text, only the first 260 characters are displayed.
(Emphasis mine)
The quick answer is that since this control wraps Delphi's TTreeView implementation, it also inherits this limitation, and thus there's not too much you can do to overcome it, besides either implementing custom drawing or finding another control without this limitation.