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app.py
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"""Databricks API Explorer -- main Dash application.
This single module defines the complete UI layout (sidebar, topbar,
response viewer, connection panel) and all server- / client-side
callbacks that drive the explorer.
Run modes:
Local:
Auth via Databricks CLI profile (SSO / OAuth / PAT) or a
manually entered workspace URL + token.
Databricks App:
Auth via On-Behalf-Of (OBO) using the
``x-forwarded-access-token`` header injected by the Databricks
Apps proxy.
Key internal data flows are documented in the *Architecture* and
*Key Patterns* sections of ``CLAUDE.md``.
"""
import json
import os
import subprocess
import threading
import time
import requests
from typing import Any, Dict, List, Optional
import dash
import dash_bootstrap_components as dbc
from dash import ALL, Input, Output, State, ctx, dcc, html, no_update
from flask import request as flask_request
from api_catalog import (
ACCOUNT_API_CATALOG,
API_CATALOG,
ENDPOINT_MAP,
TOTAL_ACCOUNT_CATEGORIES,
TOTAL_ACCOUNT_ENDPOINTS,
TOTAL_CATEGORIES,
TOTAL_ENDPOINTS,
detect_cloud,
extract_chips,
get_category_doc_url,
get_doc_url,
get_endpoint_by_id,
)
from auth import (
DATABRICKS_PROFILE,
IS_DATABRICKS_APP,
_get_local_config,
get_account_id,
get_cli_profiles,
get_current_user_info,
get_host,
get_metastore_name,
get_sp_token,
get_workspace_name,
make_api_call,
resolve_account_connection,
resolve_local_connection,
)
from version import VERSION
# ── Dash init ─────────────────────────────────────────────────────────────────
app = dash.Dash(
__name__,
external_stylesheets=[dbc.themes.CYBORG, dbc.icons.BOOTSTRAP],
title="Databricks API Explorer",
suppress_callback_exceptions=True,
meta_tags=[{"name": "viewport", "content": "width=device-width, initial-scale=1"}],
)
server = app.server
app.index_string = '''<!DOCTYPE html>
<html>
<head>
{%metas%}
<title>{%title%}</title>
<link rel="icon" type="image/svg+xml" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 331'><path d='M283.923 136.449L150.144 213.624L6.88995 131.168L0 134.982V194.844L150.144 281.115L283.923 204.234V235.926L150.144 313.1L6.88995 230.644L0 234.458V244.729L150.144 331L300 244.729V184.867L293.11 181.052L150.144 263.215L16.0766 186.334V154.643L150.144 231.524L300 145.253V86.2713L292.536 81.8697L150.144 163.739L22.9665 90.9663L150.144 17.8998L254.641 78.055L263.828 72.773V65.4371L150.144 0L0 86.2713V95.6613L150.144 181.933L283.923 104.758V136.449Z' fill='%23FF3621'/></svg>">
{%css%}
</head>
<body>
{%app_entry%}
<footer>
{%config%}
{%scripts%}
{%renderer%}
</footer>
</body>
</html>'''
# Default connection config
_DEFAULT_CONN = {"mode": "sp"} if IS_DATABRICKS_APP else {"mode": "profile", "profile": DATABRICKS_PROFILE}
# ── Flask route: serve ~/.databrickscfg in the browser ────────────────────────
@server.route("/open-databrickscfg")
def _serve_databrickscfg():
"""Serve ``~/.databrickscfg`` as a syntax-highlighted HTML page."""
import html as _html
cfg_path = os.path.expanduser("~/.databrickscfg")
try:
with open(cfg_path, encoding="utf-8") as f:
content = f.read()
except FileNotFoundError:
content = "# File not found: ~/.databrickscfg"
escaped = _html.escape(content)
highlighted = _highlight_ini(escaped)
page = (
"<!DOCTYPE html><html><head><title>~/.databrickscfg</title>"
"<style>"
"body{background:#0d1117;color:#c9d1d9;font-family:'JetBrains Mono',monospace;"
"padding:24px;margin:0;font-size:13px;line-height:1.6}"
"pre{white-space:pre-wrap;word-break:break-all;margin:0}"
".comment{color:#6a737d}.section{color:#79c0ff;font-weight:600}"
".key{color:#d2a8ff}.val{color:#a5d6ff}"
".toolbar{display:flex;align-items:center;justify-content:space-between;"
"margin-bottom:16px}"
"h1{font-size:16px;color:#58a6ff;margin:0;font-weight:500}"
".edit-btn{background:rgba(88,166,255,0.12);color:#58a6ff;border:1px solid "
"rgba(88,166,255,0.3);border-radius:6px;padding:6px 14px;font-size:12px;"
"font-family:inherit;cursor:pointer;text-decoration:none;display:inline-flex;"
"align-items:center;gap:6px;transition:all 0.15s}"
".edit-btn:hover{background:rgba(88,166,255,0.22);border-color:#58a6ff;"
"color:#79c0ff}"
".edit-btn svg{width:14px;height:14px;fill:currentColor}"
"</style></head><body>"
'<div class="toolbar">'
"<h1>~/.databrickscfg</h1>"
'<a class="edit-btn" href="/open-databrickscfg-editor" target="_self">'
'<svg viewBox="0 0 16 16"><path d="M12.854.146a.5.5 0 00-.707 0L10.5 1.793 '
"14.207 5.5l1.647-1.646a.5.5 0 000-.708l-3-3zM13.5 6.207L9.793 2.5 "
"3.622 8.671a.5.5 0 00-.121.196l-1.47 4.413a.5.5 0 00.633.633l4.413-1.47"
'a.5.5 0 00.196-.121L13.5 6.207z"/></svg>'
"Open in editor</a>"
"</div>"
"<pre>" + highlighted + "</pre>"
"</body></html>"
)
from flask import Response
return Response(page, status=200, content_type="text/html")
@server.route("/open-databrickscfg-editor")
def _open_in_editor():
"""Open ``~/.databrickscfg`` in the user's default text editor."""
import platform
import subprocess as _sp
cfg_path = os.path.expanduser("~/.databrickscfg")
system = platform.system()
try:
if system == "Darwin":
_sp.Popen(["open", cfg_path])
elif system == "Windows":
os.startfile(cfg_path)
else:
_sp.Popen(["xdg-open", cfg_path])
except Exception:
pass
from flask import redirect
return redirect("/open-databrickscfg")
def _highlight_ini(text: str) -> str:
"""Add syntax highlighting spans to escaped INI content."""
lines = []
for line in text.split("\n"):
stripped = line.lstrip()
if stripped.startswith("#") or stripped.startswith(";"):
lines.append(f'<span class="comment">{line}</span>')
elif stripped.startswith("["):
lines.append(f'<span class="section">{line}</span>')
elif "=" in line:
key, _, val = line.partition("=")
lines.append(f'<span class="key">{key}</span>=<span class="val">{val}</span>')
else:
lines.append(line)
return "\n".join(lines)
# ── JSON Syntax Highlighter ───────────────────────────────────────────────────
# ── Pagination helpers ────────────────────────────────────────────────────────
_SKIP_LIST_KEYS = frozenset({"schemas"})
# Server-side state for background "Load All" pagination
_load_all_state: Dict[str, Any] = {
"running": False,
"pages": 0,
"total_items": 0,
"items": [],
"done": False,
"error": None,
"list_key": None,
"initial_data": {},
"last_req": {},
"elapsed_ms": 0,
}
def _detect_has_more(data: Any) -> bool:
"""Check whether a paginated response has more pages to fetch.
Handles two pagination styles:
* ``has_more`` flag (standard Databricks APIs).
* SCIM-style ``totalResults`` / ``startIndex`` / ``itemsPerPage``.
"""
if not isinstance(data, dict):
return False
if data.get("has_more"):
return True
# SCIM pagination: totalResults, startIndex, itemsPerPage
total = data.get("totalResults")
start = data.get("startIndex")
per_page = data.get("itemsPerPage")
if isinstance(total, int) and isinstance(start, int) and isinstance(per_page, int):
return (start + per_page - 1) < total
return False
def _detect_next_page_token(data: Any) -> Optional[str]:
"""Extract a ``next_page_token`` from a paginated API response.
Args:
data: Parsed JSON response body.
Returns:
The token string when more pages exist, otherwise ``None``.
"""
if not isinstance(data, dict):
return None
token = data.get("next_page_token")
return token if token and isinstance(token, str) else None
def _find_list_key(data: dict) -> Optional[str]:
"""Identify the top-level key that holds the item array in a response.
Skips keys in :data:`_SKIP_LIST_KEYS` (e.g. ``"schemas"``) to
avoid false positives.
Args:
data: A parsed JSON response dict.
Returns:
The first key whose value is a ``list``, or ``None``.
"""
for k, v in data.items():
if isinstance(v, list) and k not in _SKIP_LIST_KEYS:
return k
return None
# ── JSON Tree Viewer ──────────────────────────────────────────────────────────
_TREE_CSS = (
"@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&display=swap');"
":root{"
"--t-bg:#050810;--t-text:#94a3b8;--t-text-hi:#e2e8f0;--t-muted:#475569;"
"--t-border:rgba(255,255,255,.07);--t-accent:#00d4ff;"
"--t-key:#60a5fa;--t-str:#86efac;--t-num:#fbbf24;--t-bool:#c084fc;--t-null:#94a3b8;"
"--t-punc:#64748b;--t-btn-bg:rgba(0,212,255,.07);--t-btn-border:rgba(0,212,255,.2);"
"--t-input-bg:rgba(255,255,255,.06);--t-input-border:rgba(255,255,255,.12);"
"--t-scroll:rgba(255,255,255,.12);--t-tip-bg:#1e293b;--t-mark:#7c3aed;--t-mark-cur:#f59e0b;"
"}"
"html{margin:0;padding:0;background:var(--t-bg);height:100%;overflow:hidden;}"
"body{margin:0;padding:0;background:var(--t-bg);height:100%;overflow:auto;}"
"body{font-family:'JetBrains Mono','Fira Code',ui-monospace,monospace;"
"font-size:12px;line-height:1.7;color:var(--t-text);}"
"#toolbar{position:sticky;top:0;background:var(--t-bg);border-bottom:1px solid var(--t-border);"
"padding:5px 14px;display:flex;align-items:center;gap:6px;z-index:10;}"
"#depth-label{color:var(--t-muted);font-size:11px;font-style:italic;flex:1;}"
".depth-btn{background:var(--t-btn-bg);border:1px solid var(--t-btn-border);color:var(--t-accent);"
"border-radius:4px;width:22px;height:22px;font-size:15px;line-height:1;cursor:pointer;"
"display:inline-flex;align-items:center;justify-content:center;padding:0;flex-shrink:0;}"
".depth-btn:hover{opacity:.85;}"
".depth-btn:disabled{opacity:.3;cursor:default;}"
"#root{padding:10px 14px;}"
".tree-node{display:block;}"
".node-header{display:block;}"
".toggle{display:inline-block;width:14px;text-align:center;cursor:pointer;"
"user-select:none;color:var(--t-muted);transition:color .1s;}"
".toggle:hover{color:var(--t-accent);}"
".preview{color:var(--t-muted);font-style:italic;}"
".tree-node:not(.collapsed)>.node-header>.preview{display:none;}"
".children{margin-left:20px;display:block;}"
".close-line{display:block;}"
".tree-node.collapsed>.children,.tree-node.collapsed>.close-line{display:none;}"
".kv,.item{display:block;}"
".jk{color:var(--t-key)}.jv{color:var(--t-str)}.jn{color:var(--t-num)}"
".jb{color:var(--t-bool)}.jbn{color:var(--t-null)}.jp{color:var(--t-punc)}"
".id-link{cursor:pointer;border-bottom:1px dashed currentColor;}"
".id-link:hover{color:var(--t-accent)!important;border-bottom-color:var(--t-accent);}"
".jts{position:relative;cursor:default;border-bottom:1px dotted var(--t-num);}"
".jts:hover .ts-tip{visibility:visible;opacity:1;}"
".ts-tip{visibility:hidden;opacity:0;position:absolute;bottom:calc(100% + 4px);left:50%;"
"transform:translateX(-50%);background:var(--t-tip-bg);color:var(--t-text-hi);font-size:11px;"
"padding:4px 8px;border-radius:4px;white-space:pre;pointer-events:none;line-height:1.5;"
"border:1px solid var(--t-btn-border);z-index:100;"
"transition:opacity .15s;}"
"::-webkit-scrollbar{width:6px;height:6px}"
"::-webkit-scrollbar-thumb{background:var(--t-scroll);border-radius:3px}"
"::-webkit-scrollbar-track{background:transparent}"
"*{scrollbar-width:thin;scrollbar-color:var(--t-scroll) transparent}"
"#search-box{flex:1;background:var(--t-input-bg);border:1px solid var(--t-input-border);"
"color:var(--t-text-hi);border-radius:4px;padding:2px 8px;font-family:inherit;font-size:11px;"
"outline:none;min-width:80px;}"
"#search-box:focus{border-color:var(--t-btn-border);}"
"#search-box::placeholder{color:var(--t-muted);}"
"#sc{color:var(--t-text);font-size:11px;white-space:nowrap;flex-shrink:0;min-width:44px;text-align:center;}"
"mark.sh{background:var(--t-mark);color:#fff;border-radius:2px;padding:0 1px;}"
"mark.sh.cur{background:var(--t-mark-cur);color:#050810;}"
".sep{width:1px;height:16px;background:var(--t-scroll);flex-shrink:0;}"
".sql-link-wrap{display:inline;}"
".sql-link-btn{display:inline-block;margin-left:8px;cursor:pointer;font-size:10px;"
"background:rgba(0,212,255,.1);border:1px solid rgba(0,212,255,.25);border-radius:10px;"
"padding:0 7px;color:var(--t-accent);vertical-align:middle;line-height:1.6;"
"transition:all .15s;}"
".sql-link-btn:hover{background:rgba(0,212,255,.22);border-color:rgba(0,212,255,.5);}"
)
# Raw string — no Python escape processing; JS unicode escapes work as-is in browser.
_TREE_JS = r"""
var currentDepth=INITIAL_DEPTH;
function mkEl(tag,cls,txt){var e=document.createElement(tag);if(cls)e.className=cls;if(txt!==undefined)e.textContent=txt;return e;}
function idLink(cls,display,gid,par,val,ext){var e=mkEl('span','id-link '+cls,display);e.dataset.gid=gid;e.dataset.par=par;e.dataset.val=val;if(ext)e.dataset.ext=JSON.stringify(ext);e.onclick=function(){var msg={type:'id-link',gid:e.dataset.gid,par:e.dataset.par,val:e.dataset.val};if(e.dataset.ext)msg.ext=JSON.parse(e.dataset.ext);window.parent.postMessage(msg,'*');};return e;}
function sqlLink(cls,display,fullName){var w=mkEl('span','sql-link-wrap');var v=mkEl('span',cls,display);w.appendChild(v);var btn=mkEl('span','sql-link-btn',String.fromCharCode(0x25b6)+' SELECT *');btn.title='SELECT * FROM '+fullName;btn.onclick=function(){window.parent.postMessage({type:'sql-link',full_name:fullName},'*');};w.appendChild(btn);return w;}
function sqlColLink(cls,display,colName,fullName){var w=mkEl('span','sql-link-wrap');var v=mkEl('span',cls,display);w.appendChild(v);var btn=mkEl('span','sql-link-btn',String.fromCharCode(0x25b6)+' SELECT');btn.title='SELECT '+colName+' FROM '+fullName;btn.onclick=function(){window.parent.postMessage({type:'sql-link',full_name:fullName,column:colName},'*');};w.appendChild(btn);return w;}
var TS_KEYS=/time$|_at$|timestamp$|_date$|expiration$|expired$|created$|updated$|deleted$|started$|finished$|modified$|deadline$|_ts$|start_time|end_time|creation_time|last_active_time|expiry_time/i;
function isEpoch(val,pKey){if(typeof val!=='number'||!pKey||!TS_KEYS.test(pKey))return false;if(val>1e12&&val<2e13)return val;if(val>1e9&&val<2e10)return val*1000;return false;}
function getSettingsTz(){try{return window.parent.document.documentElement.dataset.tz||'Europe/Berlin';}catch(e){return 'Europe/Berlin';}}
function tsSpan(cls,display,ms){var w=mkEl('span','jts '+cls);w.textContent=display;var tip=mkEl('span','ts-tip');var d=new Date(ms);var tz=getSettingsTz();var local=d.toLocaleString(undefined,{timeZone:tz,year:'numeric',month:'short',day:'numeric',hour:'2-digit',minute:'2-digit',second:'2-digit',hour12:false});var utc=d.toLocaleString(undefined,{timeZone:'UTC',year:'numeric',month:'short',day:'numeric',hour:'2-digit',minute:'2-digit',second:'2-digit',hour12:false});tip.textContent=local+' ('+tz.replace(/_/g,' ')+')\n'+utc+' (UTC)';w.appendChild(tip);return w;}
function renderValue(val,pKey,depth){
if(val===null)return mkEl('span','jbn','null');
var t=typeof val;
if(t==='boolean')return mkEl('span','jb',String(val));
if(t==='number'){var ms=isEpoch(val,pKey);if(ms)return tsSpan('jn',String(val),ms);var c=pKey&&LOOKUP[pKey]&&LOOKUP[pKey][String(val)];return c?idLink('jn',String(val),c.gid,c.par,String(val),c.ext):mkEl('span','jn',String(val));}
if(t==='string'){var c2=pKey&&LOOKUP[pKey]&&LOOKUP[pKey][val];if(c2)return idLink('jv','"'+val+'"',c2.gid,c2.par,val,c2.ext);var sf=pKey&&SQL_FIELDS[pKey];if(sf){if(sf.table_name&&val!==sf.table_name)return sqlColLink('jv','"'+val+'"',val,sf.full_name);return sqlLink('jv','"'+val+'"',sf.full_name);}return mkEl('span','jv','"'+val+'"');}
if(Array.isArray(val))return renderArray(val,depth);
if(t==='object')return renderObject(val,depth);
return mkEl('span','jbn',String(val));
}
function fillObj(container,obj,depth){Object.keys(obj).forEach(function(k,i,arr){var kv=mkEl('div','kv');kv.appendChild(mkEl('span','jk','"'+k+'"'));kv.appendChild(mkEl('span','jp',': '));kv.appendChild(renderValue(obj[k],k,depth+1));if(i<arr.length-1)kv.appendChild(mkEl('span','jp',','));container.appendChild(kv);});}
function fillArr(container,arr,depth){arr.forEach(function(v,i,a){var item=mkEl('div','item');item.appendChild(renderValue(v,null,depth+1));if(i<a.length-1)item.appendChild(mkEl('span','jp',','));container.appendChild(item);});}
function buildNode(openCh,closeCh,label,data,depth,isObj){
var collapsed=depth>=currentDepth;
var node=mkEl('div',collapsed?'tree-node collapsed':'tree-node');
node.dataset.depth=depth;
var hdr=mkEl('div','node-header');
var btn=mkEl('span','toggle',collapsed?'\u25b8':'\u25be');
hdr.appendChild(btn);hdr.appendChild(mkEl('span','jp',openCh));hdr.appendChild(mkEl('span','preview jp',' '+label+' '+closeCh));
node.appendChild(hdr);
var rendered=false;
function ensure(){if(rendered)return;rendered=true;var ch=mkEl('div','children');isObj?fillObj(ch,data,depth):fillArr(ch,data,depth);var cl=mkEl('div','close-line');cl.appendChild(mkEl('span','jp',closeCh));node.appendChild(ch);node.appendChild(cl);}
if(!collapsed)ensure();
node._ensure=ensure;
btn.onclick=function(){if(node.classList.contains('collapsed'))ensure();node.classList.toggle('collapsed');btn.textContent=node.classList.contains('collapsed')?'\u25b8':'\u25be';};
return node;
}
function renderObject(obj,depth){var k=Object.keys(obj);if(!k.length)return mkEl('span','jp','{}');return buildNode('{','}',k.length+(k.length===1?' key':' keys'),obj,depth,true);}
function renderArray(arr,depth){if(!arr.length)return mkEl('span','jp','[]');return buildNode('[',']',arr.length+' items',arr,depth,false);}
function applyCollapseLevel(newDepth){
currentDepth=newDepth;
document.querySelectorAll('.tree-node').forEach(function(node){
var d=parseInt(node.dataset.depth);
var btn=node.querySelector(':scope > .node-header > .toggle');
if(d>=currentDepth){
node.classList.add('collapsed');
if(btn)btn.textContent='\u25b8';
} else if(node.classList.contains('collapsed')){
if(node._ensure)node._ensure();
node.classList.remove('collapsed');
if(btn)btn.textContent='\u25be';
}
});
var lbl=document.getElementById('depth-label');
if(lbl)lbl.textContent='Collapse at depth \u2265 '+currentDepth;
var btnMinus=document.getElementById('btn-minus');
if(btnMinus)btnMinus.disabled=(currentDepth<=1);
}
function changeDepth(delta){applyCollapseLevel(Math.max(1,currentDepth+delta));}
var searchMatches=[];var searchIdx=-1;
function clearHighlights(){
document.querySelectorAll('mark.sh').forEach(function(m){
var p=m.parentNode;if(!p)return;
p.replaceChild(document.createTextNode(m.textContent),m);
p.normalize();
});
searchMatches=[];searchIdx=-1;
}
function doSearch(q){
clearHighlights();
var sc=document.getElementById('sc');
if(!q){if(sc)sc.textContent='';return;}
q=q.toLowerCase();
document.querySelectorAll('.tree-node.collapsed').forEach(function(nd){
if(nd._ensure)nd._ensure();
nd.classList.remove('collapsed');
var btn=nd.querySelector(':scope > .node-header > .toggle');
if(btn)btn.textContent='\u25be';
});
var root=document.getElementById('root');
var tw=document.createTreeWalker(root,NodeFilter.SHOW_TEXT,null,false);
var toProc=[];var nd;
while((nd=tw.nextNode())){if(nd.textContent.toLowerCase().indexOf(q)!==-1)toProc.push(nd);}
toProc.forEach(function(tn){
var txt=tn.textContent;var low=txt.toLowerCase();
var frag=document.createDocumentFragment();var last=0;var i;
while((i=low.indexOf(q,last))!==-1){
if(i>last)frag.appendChild(document.createTextNode(txt.slice(last,i)));
var mk=document.createElement('mark');mk.className='sh';mk.textContent=txt.slice(i,i+q.length);
frag.appendChild(mk);searchMatches.push(mk);last=i+q.length;
}
if(last<txt.length)frag.appendChild(document.createTextNode(txt.slice(last)));
tn.parentNode.replaceChild(frag,tn);
});
if(searchMatches.length>0){searchIdx=0;activateMatch(0);}
updateCounter();
}
function activateMatch(i){
searchMatches.forEach(function(m,j){m.classList.toggle('cur',j===i);});
if(searchMatches[i])searchMatches[i].scrollIntoView({behavior:'smooth',block:'center'});
}
function updateCounter(){
var c=document.getElementById('sc');if(!c)return;
c.textContent=searchMatches.length>0?(searchIdx+1)+'\u2009/\u2009'+searchMatches.length:'';
}
function searchNav(d){
if(!searchMatches.length)return;
searchIdx=(searchIdx+d+searchMatches.length)%searchMatches.length;
activateMatch(searchIdx);updateCounter();
}
document.addEventListener('DOMContentLoaded',function(){
document.getElementById('root').appendChild(renderValue(DATA,null,0));
applyCollapseLevel(currentDepth);
});
"""
_ENDPOINT_COLLAPSE_DEPTH: Dict[str, int] = {
"mlflow-runs-search": 6,
"pg-projects-get": 5,
}
def _build_json_tree_html(
data: Any,
chips: Optional[List[Dict]] = None,
sql_fields: Optional[List[str]] = None,
initial_depth: int = 3,
) -> str:
"""Build a self-contained HTML document with a collapsible JSON tree.
The tree is rendered entirely in vanilla JavaScript (no React /
Dash). Nodes at depth >= 3 are auto-collapsed and children are
lazy-rendered on first expand for performance with large payloads.
If *chips* are provided, matching field values become clickable
inline links that post a ``window.parent.postMessage`` event
consumed by callback 16 (``handle_iframe_link_click``).
If *sql_fields* are provided, values of those JSON keys get a
clickable play icon that posts a ``sql-link`` message to navigate
to the SQL editor with ``SELECT * FROM <value>``.
Args:
data: Any JSON-serialisable value to render.
chips: Optional list of chip dicts (from
:func:`api_catalog.extract_chips`) used to build the
``LOOKUP`` table that drives inline ID links.
sql_fields: Optional list of JSON key names whose values
should get an inline SQL query button.
Returns:
A complete ``<!DOCTYPE html>`` string suitable for use as the
``srcDoc`` of an ``<iframe>``.
"""
link_lookup: Dict[str, Dict[str, Dict]] = {}
if chips:
for chip in chips:
field = chip["id_field"]
if field not in link_lookup:
link_lookup[field] = {}
entry: Dict[str, Any] = {
"gid": chip["get_id"],
"par": chip["param"],
}
if chip.get("extras"):
entry["ext"] = chip["extras"]
link_lookup[field][str(chip["value"])] = entry
sql_fields_js = json.dumps(sql_fields or {}, ensure_ascii=False)
data_js = json.dumps(data, ensure_ascii=False, separators=(",", ":")).replace("</script>", r"<\/script>")
lookup_js = json.dumps(link_lookup, ensure_ascii=False).replace("</script>", r"<\/script>")
return "".join([
"<!DOCTYPE html><html><head><meta charset='utf-8'>",
"<style>", _TREE_CSS, "</style>",
"</head><body>",
"<div id='toolbar'>",
"<button class='depth-btn' id='btn-minus' onclick='changeDepth(-1)' title='Collapse one level more'>\u2212</button>",
"<button class='depth-btn' onclick='changeDepth(+1)' title='Expand one level more'>+</button>",
"<span id='depth-label'></span>",
"<div class='sep'></div>",
"<input id='search-box' type='text' placeholder='\U0001f50d\u2009Search\u2026' "
"oninput='doSearch(this.value)' "
"onkeydown='if(event.key===\"Enter\"){searchNav(event.shiftKey?-1:1);event.preventDefault();}' />",
"<span id='sc'></span>",
"<button class='depth-btn' onclick='searchNav(-1)' title='Previous match (Shift+Enter)'>\u2191</button>",
"<button class='depth-btn' onclick='searchNav(1)' title='Next match (Enter)'>\u2193</button>",
"</div>",
"<div id='root'></div><script>",
"const DATA=", data_js, ";",
"const LOOKUP=", lookup_js, ";",
"const SQL_FIELDS=", sql_fields_js, ";",
f"const INITIAL_DEPTH={initial_depth};",
_TREE_JS,
"</script></body></html>",
])
# ── UI Helpers ────────────────────────────────────────────────────────────────
METHOD_COLORS = {"GET": "info", "POST": "warning", "PUT": "primary", "DELETE": "danger", "PATCH": "success"}
def method_badge(method: str) -> dbc.Badge:
"""Return a colour-coded Bootstrap badge for an HTTP method.
Args:
method: HTTP verb (e.g. ``"GET"``, ``"POST"``).
Returns:
A :class:`dbc.Badge` component.
"""
return dbc.Badge(method, color=METHOD_COLORS.get(method, "secondary"), className="method-badge")
_TOKEN_CACHE_PATH = os.path.expanduser("~/.databricks/token-cache.json")
def _load_token_cache() -> dict:
"""Load the Databricks CLI token cache from disk.
Returns:
A dict with ``version`` and ``tokens`` keys. Returns a fresh
empty cache if the file does not exist.
"""
if not os.path.exists(_TOKEN_CACHE_PATH):
return {"version": 1, "tokens": {}}
with open(_TOKEN_CACHE_PATH, "r", encoding="utf-8") as fh:
return json.load(fh)
def _save_token_cache(cache: dict) -> None:
"""Persist the token cache dict back to disk.
Args:
cache: The full cache dict (must contain ``version`` and
``tokens``).
"""
with open(_TOKEN_CACHE_PATH, "w", encoding="utf-8") as fh:
json.dump(cache, fh, indent=2)
def _find_cache_entry(tokens: dict, host: str) -> Optional[dict]:
"""Find a token-cache entry matching *host*.
Looks up by exact key first, then falls back to decoding the JWT
``iss`` claim of each cached token.
Args:
tokens: The ``tokens`` sub-dict from the token cache.
host: Workspace URL to match (with or without trailing ``/``).
Returns:
The matching cache entry dict, or ``None``.
"""
import base64 as _b64
h = host.rstrip("/")
entry = tokens.get(h) or tokens.get(h + "/")
if entry:
return entry
for _v in tokens.values():
try:
payload = _v["access_token"].split(".")[1]
payload += "=" * (-len(payload) % 4)
iss = json.loads(_b64.urlsafe_b64decode(payload)).get("iss", "")
if h in iss:
return _v
except Exception:
pass
return None
def _is_token_expired(entry: dict) -> bool:
"""Check whether a cached token has expired.
Args:
entry: A single token-cache entry containing an ``expiry``
ISO-8601 timestamp string.
Returns:
``True`` if the token is expired or the expiry cannot be
parsed.
"""
from datetime import datetime, timezone
s = entry.get("expiry", "")
if not s:
return True
try:
exp = datetime.fromisoformat(s)
if exp.tzinfo is None:
exp = exp.replace(tzinfo=timezone.utc)
return exp <= datetime.now(timezone.utc)
except Exception:
return True
def _try_token_refresh(entry: dict, host: str) -> Optional[str]:
"""Attempt a silent OAuth token refresh using the stored refresh token.
On success the *entry* dict is mutated in place and the updated
token cache is persisted to disk.
Args:
entry: A token-cache entry that must contain
``refresh_token``.
host: Workspace URL used to discover the OIDC token endpoint.
Returns:
The new access token string, or ``None`` on failure.
"""
from datetime import datetime, timezone, timedelta
rt = entry.get("refresh_token", "")
if not rt:
return None
try:
oidc = requests.get(
f"{host}/oidc/.well-known/oauth-authorization-server", timeout=10
).json()
tr = requests.post(oidc["token_endpoint"], data={
"grant_type": "refresh_token",
"client_id": "databricks-cli",
"refresh_token": rt,
}, timeout=30)
if not tr.ok:
return None
d = tr.json()
token = d.get("access_token", "")
if token:
entry["access_token"] = token
entry["refresh_token"] = d.get("refresh_token", rt)
entry["expiry"] = (
datetime.now(timezone.utc) + timedelta(seconds=d.get("expires_in", 3600))
).isoformat()
cache = _load_token_cache()
cache["tokens"][host.rstrip("/")] = entry
_save_token_cache(cache)
return token or None
except Exception:
return None
def _sso_try_cached(host: str) -> Optional[str]:
"""Return a valid token from the local cache, refreshing if needed.
Args:
host: Workspace URL to look up.
Returns:
A valid access token string, or ``None`` when no usable token
is available.
"""
cache = _load_token_cache()
entry = _find_cache_entry(cache.get("tokens", {}), host)
if not entry:
return None
if not _is_token_expired(entry):
return entry["access_token"]
return _try_token_refresh(entry, host)
# ── Background SSO browser flow ──────────────────────────────────────
_sso_result: Dict[str, Any] = {} # host → {"token": ..., "error": ..., "done": bool}
_sso_lock = threading.Lock()
def _sso_browser_flow(host: str) -> None:
"""Run the blocking browser-based OAuth flow in a background thread.
Opens the system browser for SSO login, waits for the redirect
callback on ``localhost:8020``, and stores the resulting token (or
error) in :data:`_sso_result` under ``host``.
Args:
host: Workspace URL to authenticate against.
"""
from databricks.sdk.oauth import OAuthClient
from datetime import datetime, timezone, timedelta
import signal
try:
# databricks-cli client only allows http://localhost:8020 as redirect
port = 8020
# Kill any leftover listener on this port
try:
for pid in subprocess.check_output(
["lsof", "-ti", f":{port}"], stderr=subprocess.DEVNULL
).decode().split():
os.kill(int(pid.strip()), signal.SIGTERM)
time.sleep(0.3)
except Exception:
pass
redirect_url = f"http://localhost:{port}"
client = OAuthClient.from_host(
host=host, client_id="databricks-cli",
redirect_url=redirect_url,
scopes=["all-apis", "offline_access"],
)
consent = client.initiate_consent()
if not consent:
with _sso_lock:
_sso_result[host] = {"token": None, "error": "Could not initiate OAuth.", "done": True}
return
creds = consent.launch_external_browser()
tok_obj = creds.token()
token = tok_obj.access_token
if token:
cache = _load_token_cache()
expiry = tok_obj.expiry or (datetime.now(timezone.utc) + timedelta(seconds=3600))
cache["tokens"][host.rstrip("/")] = {
"access_token": token,
"token_type": "Bearer",
"refresh_token": tok_obj.refresh_token or "",
"expiry": expiry.isoformat(),
"expires_in": 3600,
}
_save_token_cache(cache)
with _sso_lock:
_sso_result[host] = {"token": token, "error": None, "done": True}
except Exception as e:
with _sso_lock:
_sso_result[host] = {"token": None, "error": str(e), "done": True}
def _resolve_conn(
conn_config: Optional[Dict],
) -> tuple:
"""Return ``(host, token)`` for the current runtime mode.
In Databricks App mode the host and token come from environment
variables and request headers; in local mode they are resolved via
:func:`auth.resolve_local_connection`.
Args:
conn_config: The ``conn-config`` Dash store value.
Returns:
A ``(host, token)`` tuple.
"""
if IS_DATABRICKS_APP:
mode = (conn_config or {}).get("mode", "sp")
if mode == "obo":
# OBO: read the user's token from the proxy header (requires
# User Authorization enabled + scopes configured in the app)
return get_host(), flask_request.headers.get("X-Forwarded-Access-Token")
# Default: Service Principal
return get_host(), get_sp_token()
return resolve_local_connection(conn_config or _DEFAULT_CONN)
def _accounts_host(workspace_host: str) -> str:
"""Derive the Databricks accounts console URL from a workspace host.
Args:
workspace_host: The workspace URL (e.g.
``https://adb-123.azuredatabricks.net``).
Returns:
The accounts console URL (e.g.
``https://accounts.azuredatabricks.net`` for Azure or
``https://accounts.cloud.databricks.com`` for AWS/GCP).
"""
h = (workspace_host or "").lower()
if "azuredatabricks" in h:
return "https://accounts.azuredatabricks.net"
if ".gcp.databricks.com" in h:
return "https://accounts.gcp.databricks.com"
return "https://accounts.cloud.databricks.com"
def build_response_panel(
result: Dict[str, Any],
chips: Optional[List[Dict]] = None,
endpoint_id: Optional[str] = None,
) -> html.Div:
"""Assemble the full response viewer panel for an API call result.
Includes a status badge, timing label, item count, the JSON tree
iframe, and an optional side panel of clickable chip items.
Args:
result: Normalised result dict from :func:`auth.make_api_call`.
chips: Optional chip list from :func:`api_catalog.extract_chips`
for rendering the side panel and inline ID links.
Returns:
A Dash ``html.Div`` component tree.
"""
code, ms, data = result["status_code"], result["elapsed_ms"], result["data"]
if 200 <= code < 300:
status_color, icon = "success", "bi-check-circle-fill"
elif code == 0:
status_color, icon = "danger", "bi-x-octagon-fill"
elif 400 <= code < 500:
status_color, icon = "danger", "bi-x-circle-fill"
else:
status_color, icon = "warning", "bi-exclamation-circle-fill"
item_count = ""
if isinstance(data, list):
item_count = f" · {len(data)} items"
elif isinstance(data, dict):
list_key = _find_list_key(data)
if list_key:
item_count = f" · {len(data[list_key])} items"
# Determine SQL-queryable fields based on endpoint
# Maps JSON key → {full_name, table_name?} for inline SQL links.
# When value == table_name → SELECT *, otherwise → SELECT <value> (column)
sql_fields = None
if endpoint_id == "uc-tables-get" and isinstance(data, dict) and data.get("full_name"):
fn = data["full_name"]
tbl = data.get("name", "")
sql_fields = {
"full_name": {"full_name": fn},
"name": {"full_name": fn, "table_name": tbl},
}
collapse_depth = _ENDPOINT_COLLAPSE_DEPTH.get(endpoint_id, 3)
# CSV response: render as a scrollable HTML table
csv_text = result.get("_csv")
if csv_text:
import csv as _csv_mod
import io
reader = _csv_mod.reader(io.StringIO(csv_text))
rows = list(reader)
if rows:
headers = rows[0]
table_header = html.Thead(html.Tr([html.Th(h) for h in headers]))
table_body = html.Tbody([
html.Tr([html.Td(cell) for cell in row])
for row in rows[1:]
])
item_count = f" · {len(rows) - 1} rows"
viewer = html.Div([
html.Table([table_header, table_body], className="csv-table"),
], className="csv-viewer")
else:
viewer = html.Iframe(
srcDoc=_build_json_tree_html(data, chips, sql_fields=sql_fields, initial_depth=collapse_depth),
style={"width": "100%", "height": "100%", "border": "none", "display": "block"},
)
else:
viewer = html.Iframe(
srcDoc=_build_json_tree_html(data, chips, sql_fields=sql_fields, initial_depth=collapse_depth),
style={"width": "100%", "height": "100%", "border": "none", "display": "block"},
)
wrapper_cls = "json-viewer-wrapper json-viewer-iframe"
# Build side panel with chip items
if chips:
sp_items = []
for i, chip in enumerate(chips):
has_label = chip["label"] != chip["title"]
name_text = chip["label"]
id_text = chip["title"] if has_label else ""
text_children = [html.Span(name_text, className="sp-name")]
if id_text:
text_children.append(html.Span(id_text, className="sp-id"))
item_children = [
html.Button(
text_children,
id={"type": "sp-item", "index": i},
n_clicks=0,
className="sp-item-main",
title=f"{chip['label']} · {chip['title']}",
),
]
for j, action in enumerate(chip.get("actions") or []):
item_children.append(html.Button(
html.I(className=f"bi {action['icon']}"),
id={"type": "sp-action", "index": i, "action": j},
n_clicks=0,
className="sp-action-btn",
title=action["title"],
))
sp_items.append(html.Div(item_children, className="sp-item"))
header_children = [
html.Button(
html.I(className="bi bi-layout-sidebar-reverse"),
id="sp-toggle-btn",
className="sp-toggle",
n_clicks=0,
title="Collapse/expand panel",
),
html.Span(f"{len(chips)} items", className="sp-header-text"),
]
side_panel = html.Div([
html.Div(className="sp-resize-handle"),
html.Div(header_children, className="sp-header"),
html.Div(sp_items, className="sp-list"),
], id="side-panel", className="side-panel")
else:
side_panel = None
body_children = [html.Div(viewer, className=wrapper_cls)]
if side_panel:
body_children.append(side_panel)
# "Query table" button for Get Table responses
query_btn = None
if endpoint_id == "uc-tables-get" and isinstance(data, dict) and data.get("full_name"):
full_name = data["full_name"]
query_btn = html.Button(
[html.I(className="bi bi-play-circle me-1"), "SELECT *"],
id={"type": "sql-query-table-btn", "name": full_name},
n_clicks=0,
className="sql-query-link-btn ms-2",
title=f"SELECT * FROM {full_name}",
)
return html.Div([
html.Div([
dbc.Badge([html.I(className=f"bi {icon} me-1"), str(code) if code else "Error"],
color=status_color, className="status-badge"),
html.Span(f"{ms:,}ms", className="timing-label font-mono ms-2"),
html.Span(item_count, className="timing-label") if item_count else None,
query_btn,
html.Span(result.get("url", ""), className="response-url ms-auto"),
], className="response-meta"),
html.Div(body_children, className="response-body"),
], className="response-container")
def build_error_panel(message: str) -> html.Div:
"""Build a styled error message panel.
Args:
message: Plain-text error description.
Returns:
A Dash ``html.Div`` with the error layout.
"""
return html.Div([
html.Div([
html.I(className="bi bi-exclamation-triangle-fill me-2 text-danger"),
html.Span(message, className="text-danger"),
], className="error-panel"),
], className="response-container")
def build_param_form(
endpoint: Dict[str, Any],
prefill: Optional[Dict[str, str]] = None,
) -> html.Div:
"""Generate the parameter input form for an endpoint.
Renders type-aware input fields for each declared parameter
(text vs. number), plus a JSON body textarea for ``POST``
endpoints.
Args:
endpoint: Endpoint definition dict from
:data:`api_catalog.API_CATALOG`.
prefill: Optional mapping of ``{param_name: value}`` used to
pre-populate fields when navigating via an inline ID link.
Returns:
A Dash ``html.Div`` containing the form rows.
"""
params: List[Dict] = endpoint.get("params", [])
method: str = endpoint.get("method", "GET")
body_template: Optional[str] = endpoint.get("body")
prefill = prefill or {}
rows = []
for p in params:
label_row = html.Div([
html.Span(p["name"], className="param-name"),
dbc.Badge("required", color="danger", className="param-badge") if p.get("required")
else dbc.Badge("optional", color="secondary", className="param-badge"),
], className="param-label")
inp = dbc.Input(
id={"type": "param-input", "name": p["name"]},
type="number" if p["type"] == "integer" else "text",
placeholder=p.get("description", ""),
value=str(prefill[p["name"]]) if p["name"] in prefill else (p.get("default", "") or ""),
className="param-input font-mono",
)
rows.append(html.Div([label_row, html.Div(p.get("description", ""), className="param-desc"), inp], className="param-row"))